Download Seagate U4 Family Product manual

............................................
HAWK 2LP Family:
............................................
ST32430N/ND
............................................
ST31230N/ND
............................................
............................................
............................................
Product Manual, Volume 1
............................................
................................................
HAWK 2LP Family:
................................................
ST32430N/ND
................................................
ST31230N/ND
................................................
................................................
................................................
Product Manual, Volume 1
................................................
© 1996 Seagate Technology, Inc. All rights reserved
Publication Number: 77767471, Revision F
March 1996
Seagate®, Seagate Technology®, and the Seagate logo are registered trademarks of Seagate Technology, Inc.
HawkTM, SeaFAXTM, SeaFoneTM, SeaTDDTM and SeaBOARDTM are trademarks of Seagate Technology, Inc.
Other product names are registered trademarks or trademarks of their own.
Seagate reserves the right to change, without notice, product offerings or specifications. No part of this
publication may be reproduced in any form without written permission of Seagate Technology, Inc.
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
v
_____________________________________________________________________________________
Revision Status Summary Sheet
Revision
Authorization
A Issue
Date
Writer/Eng.
8/29/94
D. Ashby
R. Metzner
Sheets affected
v through viii, 1 through 59
B
PLD:86170
10/24/94
D. Ashby
v, 12, 13, 37 through 41
C
PLD:86221
12/15/94
D. Ashby
Gordon Douglas
v, 24 and 59
D
PLD: 86577
08/30/95
D. Ashby
v and 33
E
PLD: 86717
1/24/96
D. Ashby
v, vi and 2
F
PLD: 86769
v and 18
Notice:
Product Manual 77767471 is Volume 1 of a two Volume document with the SCSI interface information
in the Volume 2 SCSI Interface Product Manual, P/N 77738479.
If the SCSI Interface information is needed the Volume 2 Interface Manual should be ordered, P/N
77738479.
vi
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
_____________________________________________________________________________________
Table of Contents
1.0
Scope .......................................................................................................................................... 1
2.0
Applicable standards and reference documentation ..............................................................
2.1
Standards .......................................................................................................................
2.2
Electromagnetic Compliance for the European Unionn ...................................................
2.3
Applicable reference documents .....................................................................................
3.0
General description ................................................................................................................... 3
4.0
Features......................................................................................................................................
4.1
Performance ...................................................................................................................
4.2
Reliability ........................................................................................................................
4.3
Unformatted and formatted capacities ............................................................................
4.4
Options (factory installed) ...............................................................................................
4.5
Optional accessories (user installed) ..............................................................................
4.6
Installation .......................................................................................................................
5.0
Performance characteristics ..................................................................................................... 8
5.1
Internal drive characteristics (transparent to user) .......................................................... 8
5.2
SCSI Drive Seek and write performance characteristics (visible to user) ........................ 8
5.2.1 Access time ....................................................................................................... 8
5.2.2 Format drive command execution time .............................................................. 9
5.2.3 Read data command execution time .................................................................. 9
5.2.4 Write data command execution time .................................................................. 9
5.3
Generalized performance characteristics ........................................................................ 10
5.4
Start/stop time ................................................................................................................. 12
5.5
Prefetch/multi segmented cache control ......................................................................... 12
5.5.1 Cache operation ................................................................................................. 12
5.5.2 Prefetch operation .............................................................................................. 13
5.6
Caching write data .......................................................................................................... 14
6.0
Reliability specifications ........................................................................................................... 15
6.1
Error rates ....................................................................................................................... 15
6.1.1 Read errors ........................................................................................................ 15
6.1.2 Environmental interference ................................................................................ 15
6.1.3 Write errors ........................................................................................................ 16
6.1.4 Seek errors ........................................................................................................ 16
6.2
Reliability and service ...................................................................................................... 16
6.2.1 Mean time between failure ................................................................................. 16
6.2.2 Preventive maintenance ..................................................................................... 16
6.2.3 Service life ......................................................................................................... 16
6.2.4 Service philosophy ............................................................................................. 17
6.2.5 Installation .......................................................................................................... 17
6.2.6 Service tools ...................................................................................................... 17
6.2.7 Product warranty ................................................................................................ 17
7.0
Physical/electrical specifications ............................................................................................. 18
7.1
AC power requirements .................................................................................................. 18
7.2
DC power requirements .................................................................................................. 18
7.2.1 Conducted noise immunity ................................................................................. 18
7.2.2 Power sequencing ............................................................................................. 19
7.2.3 12 V - current profile .......................................................................................... 19
2
2
2
2
5
5
5
6
6
6
7
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
vii
_________________________________________________________________________________________
7.3
7.4
7.5
7.6
Heat/power dissipation .................................................................................................... 20
Environmental limits ........................................................................................................ 20
7.4.1 Temperature ...................................................................................................... 20
7.4.2 Relative humidity ................................................................................................ 21
7.4.3 Effective altitude (sea level ref) .......................................................................... 22
7.4.4 Shock and vibration ........................................................................................... 22
7.4.5 Air cleanliness .................................................................................................... 24
Electromagnetic compatibility .......................................................................................... 24
7.5.1 Electromagnetic susceptibility ............................................................................ 24
Mechanical specifications ............................................................................................... 25
7.6.1 Drive orientation ................................................................................................. 26
7.6.2 Cooling ............................................................................................................... 26
7.6.3 Drive mounting ................................................................................................... 26
8.0
Media characteristics ................................................................................................................ 27
8.1
Media description ............................................................................................................ 27
9.0
Defect and error management .................................................................................................. 28
9.1
Drive internal defects/errors ............................................................................................ 28
9.2
SCSI systems error considerations ................................................................................. 28
10.0
Option/configuration headers................................................................................................... 29
10.1
Drive ID/Option select header ......................................................................................... 29
10.2
Grounding ....................................................................................................................... 31
11.0
Interface requirement ................................................................................................................ 32
11.1
General description ......................................................................................................... 32
11.2
SCSI interface messages supported ............................................................................... 32
11.3
SCSI interface commands supported ............................................................................. 33
11.3.1 Inquiry data ........................................................................................................ 35
11.3.2 Mode sense data ............................................................................................... 36
11.4
SCSI bus conditions and miscellaneous Features supported ......................................... 41
11.5
Synchronous data transfer .............................................................................................. 42
11.5.1 Synchronous data transfer periods supported .................................................... 42
11.5.2 REQ/ACK offset ................................................................................................. 42
11.6
Physical interface ............................................................................................................ 42
11.6.1 DC cable and connector ..................................................................................... 44
11.6.2 Physical characteristics ...................................................................................... 44
11.6.3 Mating connector requirements .......................................................................... 45
11.6.4 Electrical description .......................................................................................... 49
11.7
Disc drive timing ............................................................................................................. 53
viii
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
______________________________________________________________________________________
12.0
Options ....................................................................................................................................... 55
12.1
Front panel ...................................................................................................................... 55
12.2
Single unit shipping pack ................................................................................................ 55
12.3
Installation manual .......................................................................................................... 55
13.0
Accessories ............................................................................................................................... 56
13.1
Front panel kit ................................................................................................................. 56
13.2
Additional Installation Guide copies ................................................................................ 56
14.0
Seagate support services ......................................................................................................... 57
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
1
_____________________________________________________________________________________
1.0
Scope
This Manual describes the Seagate Technology, Inc. Hawk 2LP family Disc Drives. This high capacity, high
performance member of the Seagate 1 inch high 3.5 inch rigid disc family is a next generation product from
the ST31200 disc drive. Performance information is given in Section 5. The Hawk 2LP family model drives
interface is defined for functional compatibility to be a subset of the Seagate SCSI Interface Manual 77738479,
and the ANSI SCSI-2/SCSI-3 standards. The Hawk 2LP family drives are classified as “Intelligent” peripherals.
The Hawk 2LP Family provides Level 2 conformance (highest level) with the ANSI SCSI-1 standard. Details
of the Hawk 2LP Family drive SCSI implementation are provided in Section 11 of this Manual, (Vol. 1) and in
the SCSI Interface Product Manual P/N 77738479 (Vol. 2; Ver. 2).
The Hawk 2LP family consists of ST32430N/ND and ST31230N/ND products.
From this point on in this Product Manual the reference to Hawk 2LP family models is referred to as “the drive”
(unless reference to individual models are necessary).
The drive printed circuit board is referred to as a PCB.
S
EA
G
AT
E
Figure 1-1. Hawk 2LP family drive
2
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
_____________________________________________________________________________________
2.0
Applicable standards and reference documentation
The drive has been developed as a system peripheral to the highest standards of design and construction. The
drive depends upon its host equipment to provide adequate power and environment in order to achieve
optimum performance and compliance with applicable industry and governmental regulations. Special
attention must be given in the areas of safety, power distribution, shielding, audible noise control, and
temperature regulation. In particular, the drive must be securely mounted in order to guarantee the specified
performance characteristics.
2.1
Standards
The Hawk 2LP Family complies with Seagate standards as noted in the appropriate sections of this Manual
and the Seagate SCSI Interface Manual, P/N 77738479 (Vol. 2, Version 2).
The Hawk 2LP Family is a UL Recognized component per UL 1950 and a CSA Certified component per CAN/
CSA-C22.2 No. 950-M89. It also meets the requirements of DIN VDE 0805:1993 and EN60950: 1992 (IEC
950).
The drive, as delivered, is designed for system integration and installation into a suitable enclosure prior to use.
As such the drive is supplied as a subassembly and is not subject to Subpart J of Part 15 of the FCC Rules
and Regulations nor the Radio Interference Regulations of the Canadian Department of Communications.
However, the unit has been tested using proper shielding and grounding and found to be compliant with Class
A limits of the FCC Rules and the Regulations of The Canadian Department of Communications.
The physical design characteristics of the drive serve to minimize radiation when installed in an enclosure that
provides reasonable shielding. As such, the drive is capable of meeting the Class B limits of the FCC Rules
and Regulations of the Canadian Department of Communication. However, it is the users responsibility to
assure that the drive meets the appropriate EMI requirements in their system. Shielded I/O cables may be
required if the enclosure does not provide adequate shielding. If the I/O cables are external to the enclosure,
shielded cables should be used, with the shields grounded to the enclosure and to the host controller.
2.2
Electromagnetic Compliance for the European Union
If this model has the CE Marking it complies with the European Union requirements of the Electromagnetic
Compatibility Directive 89/336/EEC of 03 May 1989 as amended by Directive 92/31/EEC of 28 April 1992 and
Directive 93/68/EEC of 22 July 1993.
Seagate uses an independent laboratory to confirm compliance to the above directives. The drive was tested
in a representative system for typical applications. The selected system represents the most popular
characteristics for test platforms. The system configurations include:
•
•
•
•
486, Pentium, and Power PC Microprocessors
3.5-inch Floppy Disc Drive
Keyboard
Monitor/Display
Although the test system with this Seagate model complies to the directives, we cannot guarantee that all
systems will comply. The computer manufacturer or system integrator shall confirm EMC compliance and
provide CE Marking for their product.
2.3
Applicable reference documents
Installation Guide
SCSI Interface Manual
Seagate P/N 77767475
Seagate P/N 77738479
ANSI Small Computer System Interface (SCSI): Document Number ANSI3.131-1986 (X3T9/84.40 Rev. 1B)
(X3T9.2/82-2 Rev. 17B), X3T9.2/86-109 Revision 10H (SCSI-2) and X3T9.2-184 Rev. 4 (SCSI-3).
Package Test Specification
Package Test Specification
Seagate P/N 30190-001 (under 100 lb.)
Seagate P/N 30191-001 (over 100 lb.)
In case of conflict between this document and any referenced document, this document takes precedence.
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
3
_____________________________________________________________________________________
3.0
General description
The drives are a member of a family of low cost, high performance, highly reliable, random access storage
devices designed to meet the needs of the OEM marketplace.
The drive records and recovers data on 3.7 inch (95 mm) fixed discs.
The drive supports the Small Computer System Interface as described in the ANSI SCSI-1, SCSI-2 and SCSI3 Interface Manuals to the extent described in this product Manual (Vol. 1), which defines the product
performance characteristics of the Hawk 2LP Family of drives, and the SCSI Interface Product Manual P/N
77738479 (Vol. 2, Version 2) which describes the general interface characteristics of this and other families
of Seagate 3.5-inch drives.
The drive interface supports multiple initiators, disconnect/reconnect, self configuring host software and
automatic features that relieve the host from the necessity of knowing the physical characteristics of the targets
(logical block addressing is used).
The Head/Disc Assembly (HDA) is environmentally sealed at the factory. Air recirculates within the Head/Disc
(HDA) through a nonreplaceable filter to maintain a contamination free head/disc environment.
Refer to Figure 3.0-1 an exploded view of the drive. NEVER disassemble the Head/Disc Assembly (HDA). This
exploded view is for information only. Do not attempt to service items in the sealed environmental enclosure
(heads, media, actuator, etc.) as this requires special facilities. The drive contains no parts replaceable by the
user. The drive warranty is voided if the HDA is opened.
The Hawk 2LP Family drives use a dedicated landing zone at the innermost radius of the media to eliminate
the possibility of destroying or degrading data by landing in the data zone. The drive automatically goes to the
landing zone when the power is removed.
The Hawk 2LP Family drives incorporate an automatic shipping lock which prevents potential damage to the
heads and discs that result from movement during shipping and handling. The shipping lock is automatically
disengaged when power is applied to the drive and the head load process begins.
The Hawk 2LP Family drives decode track location from the dedicated servo surface to eliminate mechanical
transducer adjustments and related reliability concerns.
The Hawk 2LP Family drives use a high performance actuator assembly that consists of a low inertia, balanced,
patented, straight arm design that provides excellent performance with minimum power dissipation.
4
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
_____________________________________________________________________________________
Figure 3.0-1. Hawk 2LP family drive
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
5
_____________________________________________________________________________________
4.0
Features
The Hawk 2LP Family has the following standard features:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Integrated SCSI Controller
Single Ended and Differential SCSI drivers and receivers
Asynchronous and Synchronous data transfer protocol
Firmware downloadable via SCSI interface
Selectable sector size from 256 to 4096 bytes/sector
Programmable sector reallocation scheme
Flawed sector reallocation at format time
Programmable auto write and read reallocation
Reallocation of defects on command (Post Format)
96 bit Reed-Solomon error correcting code
Sealed Head/Disc Assembly
No preventative maintenance or adjustment required
Dedicated head landing zone
Automatic shipping lock
Automatic Adaptive Thermal Compensation
Patented Tri-phase Servo with embedded Grey Code Track Address to guarantee servo positioning.
Self diagnostics performed at power on
1:1 Interleave
Zoned Bit Recording (ZBR)
Vertical, horizontal, or top down mounting
Dynamic spindle brake
Permanently mounted terminators on "N" models, enabled by installation of a jumper plug.
512 K byte data buffer
4.1
•
•
•
•
•
•
•
Programmable multi-segmentable cache buffer
5411 RPM Spindle. Average latency = 5.54 ms
Command Queuing of up to 64 commands
Background processing of queue
Supports start and stop commands
Low audible noise for office environment
Low power consumption
4.2
•
•
•
•
•
Performance
Reliability
800,000 hour MTBF
Adaptive servo calibration for improved seek performance
LSI circuitry
Balanced low mass rotary voice coil actuator
5 year warranty
6
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
_____________________________________________________________________________________
4.3
Unformatted and formatted capacities
Formatted capacity depends on the number of spare reallocation sectors reserved and the number of bytes
per sector. The following table shows some typical 512 byte sector size [1] formatted capacities.
Spare Sector or Cylinders
Reserved for reallocation
No Spares
Five Spare Sectors per Cylinder [2]
Nine Spare Sectors per Cylinder [2]
2 Spare Cylinders per Unit [3]
One Spare Sector per Cylinder and
2 Spare Cylinder per Unit [3]
Unformatted Capacity
ST32430N/ND
GB
ST31230N/ND
GB
2.16
1.07
1.06
2.14
2.16
2.16
1.07
1.06
2.59
1.28
Notes.
[1] Sector size selectable at format time. Users having the necessary equipment may modify the data block
size before issuing a format command and obtain different formatted capacities than those listed. User
available capacity depends on spare reallocation scheme selected. See Mode Select Command and
Format Command in the SCSI Interface Product Manual P/N 77738479.
[2] All spare sectors are on one track.
[3] Spare cylinders are on the two inner tracks.
The standard OEM model is as follows:
ST32430N/ND
ST31230N/ND
Formatted Data Block Size
512 Byte/Sector
2.14 GB*
1.06 GB*
Unformatted
2.59 GB
1.28 GB
* Sparing equivalent to one spare sector per head (all spare sectors are on one track), two spare cylinders/
unit.
Installation Guide P/N 77767473 is shipped with each drive unless otherwise requested.
4.4
Options (factory installed)
The capacities shown in paragraph 4.3 are available upon request. Other capacities can be ordered depending
on sparing scheme and sector size requested.
The following options are incorporated at the time of production. See Section 12.0.
• Front panel (green LED) - See Figure 3.0-1
• Single Unit shipping pack
4.5
Optional accessories (user installed)
The following accessories are available. All kits may be installed in the field. See Section 13.0.
• Front Panel Kit (with green LED) - See Figure 3.0-1
• Single Unit shipping pack kit
• Adapter Accessory Frame Kit P/N 75790701 (adapts 3.5-inch drive to fit in 5.25-inch drive mounting space)
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
7
_____________________________________________________________________________________
4.6
Installation
For option jumper locations and definitions refer to Figure 10.1-1. Drive default mode parameters are not
normally needed for installation. Refer to Section 11.3.2 for default mode parameters if they are needed.
• Ensure that the SCSI ID of the drive is not the same as the host adapter. Most host adapters use SCS ID
7.
• If multiple devices are on the bus set the drive SCSI ID to one that is not presently used by other devices on
the bus.
• If the drive is the only device on the bus, attach it to the end of the SCSI bus cable. Permanently installed
terminators must be enabled on the drive for "N" models using jumper plug TE. On "ND" models, external
terminators must be provided by the user, systems integrator or host equipment manufacturer.
• If the drive is attached to a bus that contains other devices, and the new drive is not attached to the end of
the bus, the Terminator Enable jumper (TE) should be removed from the new drive.
• Set all appropriate option jumpers for desired operation prior to power on. If jumpers are changed after power
has been applied, recycle the drive power to make the new settings effective.
• Installation instructions are provided by host system documentation or with any additionally purchased drive
installation software. If necessary see section 14.0 for Seagate support services telephone numbers.
• The Manufacturers installed labels must not be removed from the drive or covered with additional labels, as
they contain information required when servicing the product.
Formatting
• It is not necessary to low level format this drive. The drive is shipped from the factory low level formatted in
512 byte sectors.
• Reformat the drive if one of the following occurs.
- A different sector size is selected.
- A different spare sector allocation scheme is selected.
8
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
_____________________________________________________________________________________
5.0
Performance characteristics
5.1
Internal drive characteristics (transparent to user)
Drive Capacity
Read/Write Heads
Bytes/Track
Bytes/Surface
Tracks/Surface, Total
Tracks/Inch
Servo Heads
Internal Data Rate
Disc Rotational Speed
Average Rotational Latency
ST32430N/ND
2.59 ......................
9 ...........................
72000 ...................
287.7 ....................
3992 .....................
4200 .....................
1 ...........................
35.8 - 62.2 ............
5411+ 0.5% ..........
5.54 ......................
ST31230N/ND
1.28 ............... GByte (UNF)*
5
64242 ............ Bytes (Avg)*
255.6 ............. Mbytes (UNF)
3992 .............. Tracks (user accessible)
4200 .............. TPI
1
33.9 - 56.7 ..... Mbits/sec (variable with zone)
5411 +0.5% ... r/min
5.54 ............... ms
*Rounded off values.
5.2
SCSI Seek, Read and Write performance characteristics (visible to user) [8]*
The values given in section 5.2 apply to all models of the Hawk 2LP family unless otherwise specified. Refer
to Section 11.7 and to the SCSI-2 Interface Product Manual 77738479 for additional timing details.
5.2.1
Access time
Including Controller Overhead
(without disconnect) [1] [4]
Drive Level
Read
ms
Write
Average
Typical
[3]
10.4
[2]
11.9
11.4
13.4
Typical [3]
2.1
2.5
Max.
Single Track
-
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
9
_____________________________________________________________________________________
5.2.2
Format drive command execution time (minutes) [1]*
Maximum (with verify)
Maximum (no verify)
5.2.3
ST32430N/ND
45
31
ST31230N/ND
25
15
Read data command execution time [4]
(512 byte sector size, without disconnect and with read look ahead cache disabled.)
Latency time is included.
a. From CDB reception to the drive request for the first data byte to be transferred to the Host
1. Typical (Zero Stroke Seek)
2. Typical (Average Seek)
3. Maximum (Full Stroke Seek)
7.32 ms [3]*
17.14 ms [3]
31.78 ms [2]
b. Single Sector Read and Transfer of data to Host (time from receipt of last byte of the CDB to the request
for a status byte transfer to Host) [7].
1. Typical (Zero Stroke Seek)
2. Typical (Average Seek)
3. Maximum (Full Stroke Seek)
5.2.4
7.42 ms [3]
17.24 ms [3]
31.84 ms [2]
Write data command execution time [4]
(512 byte sector size, without disconnect and with read look ahead disabled.)
Latency time is included.
a. From CDB reception to the request for the first byte of write data from the Host.
1. Typical
1.49 ms
2.
Maximum
1.61 ms
b. Single Sector Write and Data Transfer from Host [7] [6]
(Time from receipt of the last byte of the CDB to the request for a completion status transfer to the
Host)
1.
2.
3.
Typical (Zero Stroke Seek)
Typical (Average Seek)
Maximum (Full Stroke Seek)
*[ ] All notes are listed in Section 5.3.1.
7.72 ms [3]
17.29 ms [3]
32.28 ms [2]
10
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
_____________________________________________________________________________________
5.3
Generalized performance characteristics
Minimum Sector Interleave (All Hawk 2LP models)
1 to 1
Data transfer rate (< 1 sector) - 512 Byte Sector, Data Buffer To/From Disc Media:
ST32430N/ND
Min.
[4]*
4.48 MByte/sec
Avg.
[4]
6.50 MByte/sec
Max. [4]
7.78 MByte/sec
ST31230N/ND
4.23 MByte/sec
5.79 MByte/sec
7.09 MByte/sec
Data Transfer Rate (< 1 Track) - 512 Byte Sector, Data Buffer To/From Disc Media:
ST32430N/ND
Min.
[4]
3.76 MByte/sec divided by (Interleave Factor)
Avg.
[4]
5.46 MByte/sec divided by (Interleave Factor)
Max. [4]
6.54 MByte/sec divided by (Interleave Factor)
ST31230N/ND
3.56 MByte/sec
4.87 MByte/sec
5.96 MByte/sec
SCSI Interface Data Transfer Rate (Asynchronous) [5] (All Hawk 2LP models)
-Maximum Instantaneous
-Maximum Average
N family
5.2 [9] MBytes/sec
3.1
MBytes/sec
ND family
3.3 MBytes/sec
2.4 MBytes/sec
The remainder of the specifications of section 5.3 apply to all Hawk 2LP models:
Sector Sizes
512 byte user data blocks (default)
Variable (256 to 4096 bytes per sector) in even number of bytes per sector. If n (number of
bytes per sector) is odd, then n-1 will be used.
Synchronous Transfer Rate
From 1.25 MBytes/sec to 10.0 MBytes/sec (See section 11.5.)
Read/Write consecutive sectors on a track
YES
Flaw reallocation performance impact (For flaws reallocated at format
time using the spare sectors per track reallocation scheme.) [10]
Negligible
Flaw reallocation performance impact (For flaws reallocated at format time
using the spare sectors per cylinder reallocation scheme.) [10]
Negligible
Flaw reallocation performance impact (For flaws reallocated at format
time using the spare tracks per volume reallocation scheme.)
35 ms (typical)
Overhead time for head switch (512 byte sectors)
Overhead time for one track cylinder switch
Average rotational latency
1 ms
<3 ms Typical
5.54 ms
*[ ]
Notes listed in Section 5.3.1
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
11
_____________________________________________________________________________________
5.3.1
Notes for sections 5.2 and 5.3.
[1]
Execution time measured from receipt of the last Byte of the Command Descriptor Block (CDB) to the
request for a Status Byte Transfer to the Initiator (excluding connect/disconnect).
[2] Maximum times are specified over the worst case conditions of temperature, voltage margins and drive
orientation. When comparing specified access times, care should be taken to distinguish between typical
access times and maximum access times. The best comparison is obtained by system benchmark tests
conducted under identical conditions. Maximum times do not include error recovery.
[3] Typical Access times are measured under nominal conditions of temperature, voltage, and horizontal
orientation as measured on a representative sample of drives.
[4] Assumes no errors and no sector has been relocated.
[5] Rate measured from the start of the first sector transfer to or from the Host.
[6] Assumes the Initiator immediately sends Write Data to the drive when requested.
[7] Command execution requires a data transfer phase (data to or from the disc media). Assumes the initiator
is instantly ready to send or receive the data when the drive generates first request for a data byte transfer,
and assumes an average data transfer rate between the drive and the Initiator as specified in section 5.3.
[8] All performance characteristics assume that automatic adaptive temperature compensation is not in
process when the SCSI command is received. The following paragraphs give highlights of thermal
calibration operation.
a. At spin-up, all heads are calibrated on the outer and inner diameter calibration tracks.
b. A timed calibration occurs 1 minute after spin-up, and every 10 minutes thereafter. During these
timed calibrations, the firmware alternates between the inner and outer diameter calibration tracks.
For example, all heads are calibrated on the inner track, then 10 minutes later all heads are calibrated on the outer track. Automatic adaptive temperature calibration does not interrupt SCSI commands being executed.
c. If automatic adaptive thermal calibration is in process when the drive receives a SCSI command, the
drive queues the command until the compensation for the specific head being compensated completes. When compensation completes for the specific head being compensated, the drive executes
the first queued command. When execution of the first queued command completes, the drive continues compensation for the remaining head(s). The above procedure continues until the drive completes compensation for all heads.
d. When a timed calibration comes due, the drive postpones the calibration until the drive has been idle
for 25 to 50 milliseconds.
e. When the drive receives a Write command, the drive performs a single head calibration if a calibration has been delayed for 1 to 5 minutes. The drive performs an uninterruptible calibration of all heads
if the calibration has been delayed more than 5 minutes.
f. The drive preforms a calibration of all heads prior to the first retry of any media error if a timed
calibration has been delayed for over one minute.
g. Automatic adaptive temperature compensation takes less than 0.1% of bus time.
h. Automatic adaptive temperature compensation occurs at times other than mentioned above, but
should be transparent to the user (e.g., during execution of Format, Rezero, and Reassign Block
commands).
i. A rezero command can be used to reset the Automatic adaptive temperature compensation timer
back to start so that the host can know when the interruption for timed thermal compensation will
occur.
[9] Assumes system ability to support 5.2 Mb/s and no cable loss.
[10] Simulated.
__________
*SCSI commands are described in the SCSI Interface manual, 77738479.
12
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
_____________________________________________________________________________________
5.4
Start/stop time
After DC power has been applied, the drive becomes ready within 20 seconds (15 seconds typical) if the Motor
Start Option is disabled (i.e. the motor starts as soon as the power has been applied). During this time the drive
responds to some commands over the SCSI interface* in less than 3 seconds. Stop time is less than 20 seconds
from removal of DC power.
If the Motor Start Option is enabled, the internal controller accepts the commands listed in the SCSI Interface
Product Manual* less than 3 seconds after DC power has been applied. After the Motor Start Command has
been received the drive becomes ready for normal operations within 13 seconds typically. The Motor Start
Command can also be used to command the drive to stop the spindle*.
There is no power control switch on the drive.
5.5
Prefetch/multi segmented cache control
The drive provides prefetch (read look-ahead) and multi-segmented cache control algorithms that in many
cases can enhance system performance. “Cache” as used herein refers to the drive buffer storage space when
it is used in “cache” operations. To select prefetch and cache features the host sends the Mode Select
command with the proper values in the applicable bytes in Mode Page 08h*. Prefetch and cache operation are
independent features from the standpoint that each is enabled and disabled independently via the Mode Select
command. However, in actual operation the prefetch feature overlaps cache operation somewhat as is noted
in sections 5.5.1 and 5.5.2.
All default cache and prefetch Mode parameter values (Mode Page 08h) for standard OEM versions of this drive
family are given in Tables 11.3.2-1 through 11.3.2-4.
5.5.1
Cache operation
In general, 480 Kbytes of the 512 Kbytes of physical buffer space in the drive can be used as storage space
for cache operations. The buffer can be divided into logical segments (Mode Select Page 08h, byte 13) from
which data is read and to which data is written. The drive maintains a table of logical block disk medium
addresses of the data stored in each segment of the buffer. If cache operation is enabled (RCD bit = 0 in Mode
Page 08h, byte 2, bit 0. See SCSI Interface Product Manual*), data requested by the host with a Read command
is retrieved from the buffer (if it is there), before any disc access is initiated. If cache operation is not enabled,
the buffer (still segmented with required number of segments) is still used, but only as circular buffer segments
during disc medium read operations (disregarding Prefetch operation for the moment). That is, the drive does
not check in the buffer segments for the requested read data, but goes directly to the medium to retrieve it. The
retrieved data merely passes through some buffer segment on the way to the host. On a cache “miss”, all data
transfers to the host are in accordance with “buffer-full” ratio rules. On a cache “hit” the drive ignores the “bufferfull” ration rules. See explanations associated with Mode page 02h (disconnect/reconnect control) in the SCSI
Interface Product Manual*.
The following is a simplified description of a read operation with cache operation enabled:
Case A - A Read command is received and the first logical block (LB) is already in cache:
1. Drive transfers to the initiator the first LB requested plus all subsequent contiguous LB’s that are already
in the cache. This data may be in multiple segments.
2. When the requested LB is reached that is not in any cache segment, the drive fetches it and any remaining
requested LB’s from the disc and puts them in a segment of the cache. The drive transfers the remaining
requested LB’s from the cache to the host in accordance with the disconnect/reconnect specification
mentioned above.
3. If the prefetch feature is enabled, refer to section 5.5.2 for operation from this point.
__________
*SCSI Interface Product Manual, 77738479.
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
13
_____________________________________________________________________________________
Case B - A Read command requests data, the first LB of which is not in any segment of the cache:
1. The drive fetches the requested LB’s from the disc and transfers them into a segment, and from there to
the host in accordance with the disconnect/reconnect specification referred to in case A.
2. If the prefetch feature is enabled, refer to section 5.5.2 for operation from this point.
Each buffer segment is actually a self-contained circular storage (wrap-around occurs), the length of which is
an integer number of disc medium sectors. The wrap-around capability of the individual segments greatly
enhances the buffer’s overall performance as a cache storage, allowing a wide range of user selectable
configurations, which includes their use in the prefetch operation (if enabled), even when cache operation is
disabled (see section 5.5.2). The number of segments may be selected using the Mode Select command, but
the size can not be directly selected. Size is selected only as a by-product of selecting the segment number
specification. The size in Kbytes of each segment is reported by the Mode Sense command page 08h, bytes
14 and 15. If a size specification is sent by the host in a Mode Select command (bytes 14 and 15) no new
segment size is set up by the drive, and if the “STRICT” bit in Mode page 00h (byte 2, bit 1) is set to one, the
drive responds as it does for any attempt to change unchangeable parameters (see SCSI I/O Product Manual*).
The drive supports operation of any integer number of segments from 1 to 16.
5.5.2
Prefetch operation
If the Prefetch feature is enabled, data in contiguous logical blocks on the disc immediately beyond that which
was requested by a Read command can be retrieved and stored in the buffer for immediate transfer from the
buffer to the host on subsequent Read commands that request those logical blocks (this is true even if “cache”
operation is disabled). Though the prefetch operation uses the buffer as a “cache”, finding the requested data
in the buffer is a prefetch “hit”, not a “cache” operation “hit”. Prefetch is enabled using Mode Select page 08h,
byte 12, bit 5 (Disable Read Ahead - DRA bit). DRA bit = 0 enables prefetch. Since data that is prefetched
replaces data already in some buffer segment(s), the host can limit the amount of prefetch data to optimize
system performance. The max prefetch field (bytes 8 and 9) limits the amount of prefetch. The drive does not
use the prefetch “ceiling” field (bytes 10 and 11).
During a prefetch operation, the drive crosses a cylinder boundary to fetch more data only if the Discontinuity
(DISC) bit is set to one in bit 4 of byte 2 of Mode parameters page 08h.
Whenever prefetch (read look-ahead) is enabled (enabled by DRA = 0), it operates under the control of ARLA
(Adaptive Read Look-Ahead). ARLA enables prefetch of contiguous blocks from the disk when it senses that
a prefetch “hit” will likely occur, even if two consecutive read operations were not for physically contiguous
blocks of data (e.g. “software interleave”). ARLA disables prefetch when it decides that a prefetch "hit" will not
likely occur. If the host is not using software interleave, and if two sequential read operations are not for
contiguous blocks of data, ARLA disables prefetch, but as long as sequential read operations request contiguous blocks of data, ARLA keeps prefetch enabled.
__________
*SCSI Interface Product Manual, P/N 77738479.
14
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
_____________________________________________________________________________________
5.6
Caching write data
Write caching is a write operation by the drive that makes use of a drive buffer storage area where the data
to be written to the medium is stored in one or more segments while the drive performs the write command.
Write caching is enabled along with read caching. For write caching, the same buffer space and segmentation
is used as set up for read functions. The buffer segmentation scheme is set up or changed independently,
having nothing to do with whether or not read and write caching is enabled or disabled. When a write command
is issued, the cache is first checked to see if any logical blocks that are to be written are already stored in the
cache from a previous read or write command. If there are, the respective cache segments are cleared. The
new data is cached for subsequent Read commands.
If the number of write data logical blocks exceeds the size of the segment being written into when the end of
the segment is reached, the data is written into the beginning of the same cache segment, overwriting the data
that was written there at the beginning of the operation. However, the drive does not overwrite data that has
not yet been written to the medium.
Tables 11.3.2-1 through 11.3.2-4 show Mode default settings for the drives.
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
15
_____________________________________________________________________________________
6.0
Reliability specifications
The following reliability specifications assume correct host/drive operational interface, including all interface
timings, power supply voltages, and environmental requirements.
Seek Errors
Read Error Rates [1]
Unrecovered Data
Miscorrected Data
MTBF
Service Life
Preventive Maintenance
Less than 1 in 107 seeks
Less than 1 sector in 1014 bits transferred
Less than 1 sector in 1021 bits transferred
800,000 hours
5 years
None required
Note.
[1] Error rate specified with automatic retries and data correction with ECC enabled and all flaws reallocated.
6.1
Error rates
The error rates stated in this specification assume the following:
a. The drive is operated per this specification using DC Power as defined in this Manual (see Section 7.2).
b. The drive has been formatted with the SCSI FORMAT commands.
c. Errors caused by media defects or host system failures are excluded from error rate computations. Refer
to Paragraph 8.0, Media Characteristics.
6.1.1
Read errors
Before determination or measurement of read error rates:
a. The data that is to be used for measurement of read error rates must be verified as being written correctly
on the media.
b. All media defect induced errors must be excluded from error rate calculations.
6.1.2
Environmental interference
When evaluating systems operation under conditions of Electromagnetic Interference (EMI), the performance
of the drive within the system shall be considered acceptable if the drive does not generate an unrecoverable
condition.
An unrecoverable error, or condition, is defined as one that:
1. Is not detected and corrected by the drive itself;
2. Is not capable of being detected from the error or fault status provided through the drive or SCSI interface;
or
3. Is not capable of being recovered by normal drive or system recovery procedures without operator
intervention.
16
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
_____________________________________________________________________________________
6.1.3
Write errors
Write errors can occur as a result of media defects, environmental interference, or equipment malfunction.
Therefore, write errors are not predictable as a function of the number of bits passed.
If an unrecoverable write error occurs because of an equipment malfunction in the drive, the error is classified
as a failure affecting MTBF. Unrecoverable write errors are those which cannot be corrected within two
attempts at writing the record with a read verify after each attempt (excluding media defects).
6.1.4
Seek errors
A seek error is defined as a failure of the drive to position the heads to the addressed track. There shall be no
more than one recoverable seek error in 107 physical seek operations. After detecting an initial seek error, the
drive automatically reseeks to the addressed track up to 3 times. If a reseek is successful, the Extended Sense
reports a seek positioning error (15h), no seek complete error (02h), or track follow error (09h), and the sense
key reports a recovered error (1h). If all three reseeks fail, a seek positioning error (15h) is reported with a
Medium (3h) or Hardware error (4h) reported in the Sense Key. This is an unrecoverable seek error.
Unrecoverable seek errors are classified as failures for MTBF calculations. Ref. section 5.1.1.2 of SCSI-2
Interface Product Manual P/N 77738479.
6.2
Reliability and service
6.2.1
Mean time between failure
The production disc drive shall achieve an MTBF of 800,000 hours when operated in a benign atmosphere at
an average disc drive ambient temperature of 95°F (35°C) or less as measured per this Product Manual,
paragraph 7.4.1. Short term excursions up to the specification limits of the operating environment will not affect
MTBF performance.
The following expression defines MTBF:
Estimated power-on operating hours in the period
MTBF per measurement period
=
Number of drive failures in the period
Estimated power-on operation hours means power-up hours per disc drive times the total number of disc drives
in service. Each disc drive shall have accumulated at least nine months of operation. Data shall be calculated
on a rolling average base for a minimum period of six months.
Drive failure means any stoppage or substandard performance caused by drive malfunction.
6.2.2
Preventive maintenance
No routine scheduled preventive maintenance shall be required.
6.2.3
Service life
The drive shall have a useful service life of five years. Depot repair or replacement of major parts is permitted
during the lifetime (6.2.4).
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
17
_____________________________________________________________________________________
6.2.4
Service philosophy
Special equipment is required to repair the drive HDA. In order to achieve the above service life, repairs must
be performed only at a properly equipped and staffed service and repair facility. Troubleshooting and repair
of PCBs in the field is not recommended, because of the extensive diagnostic equipment required for effective
servicing. Also, there are no spare parts available for this drive. Drive warranty is voided if the HDA is opened.
6.2.5
Installation
The drive is designed, manufactured, and tested with a “Plug in and Play” installation philosophy. This
philosophy minimizes the requirements for highly trained personnel to integrate the drive into the OEM’s
system, whether in a factory or field environment.
The drive has been low level formatted at the factory and need not be reformatted.
6.2.6
Service tools
No special tools are required for site installation or recommended for site maintenance. Refer to Paragraph
6.2.4. The depot repair philosophy of the drive precludes the necessity for special tools. Field repair of the drive
is not practical since there are no user purchasable parts in the drive.
6.2.7
Product warranty
Beginning on the date of shipment to customer and continuing for a period of five years, Seagate warrants that
each product (including components and subassemblies) or spare part that fails to function properly under
normal use due to defect in materials on workmanship or due to nonconformance to the applicable
specifications will be repaired or replaced, at Seagate’s option and at no charge to customer, if returned by
customer at customer’s expense to Seagate’s designated facility in accordance with Seagate’s Warranty
Procedure. Seagate will pay for transporting the repair or replacement item to customer. For more detailed
warranty information refer to the Standard terms and conditions of Purchase for Seagate products.
Shipping:
When transporting or shipping a drive, a Seagate approved container must be used. Keep your original box.
They are easily identified by the Seagate Approved Package label. Shipping a drive in a non-approved
container voids the drive warranty.
Seagate repair centers may refuse receipt of components improperly packaged or obviously damaged in
transit. Contact your Authorized Seagate Distributor to purchase additional boxes. Seagate recommends
shipping by an air-ride carrier experienced in handling computer equipment.
Product repair and return information
Seagate customer service centers are the only facilities authorized to service Seagate drives. Seagate does
not sanction any third-party repair facilities. Any unauthorized repair or tampering with the factory-seal voids
the warranty.
18
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
_____________________________________________________________________________________
7.0
Physical/electrical specifications
7.1
AC power requirements: None
7.2
DC power requirements
The voltage and current requirements for a single drive are shown in the following table. Values indicated apply
at the drive power connector. The single ended power requirements includes the internal disc drive SCSI I/O
termination.
Table 7.2-1. DC power requirements
Voltage
Regulation [4] [2]
Average Idle Current [1]
Maximum Starting Current
(Peak) [5][2][6]
Delayed Motor Start (Max) [3][5]
Operating Current [6]
Typ. [1]
Max. [1]
Max. (Peak)
ST32430
Single Ended
Differential I/O
+5 V
+12 V +5 V
+12V
±5%
±5%
+5%
+5%
0.36 A 0.35 A 0.51 A 0.35 A
ST31230
Single Ended
Differential I/O
+5 V
+12 V +5 V
+12V
±5%
±5%
+5%
+5%
0.36 A 0.35 A 0.51 A 0.35 A
0.61 A
0.56 A
2.0 A
0.22 A
0.71 A
0.56 A
2.0 A
0.22 A
0.61 A
0.56 A
2.0 A
0.22 A
0.71 A
0.56 A
2.0 A
0.22 A
0.80 A
0.85 A
1.1 A
0.40 A
0.42 A
1.9 A
0.90 A
1.05 A
1.3 A
0.40 A
0.42 A
1.9 A
0.80 A
0.85 A
1.1 A
0.40 A
0.42 A
1.9 A
0.90 A
1.05 A
1.3 A
0.40 A
0.42 A
1.9 A
[1] Measured with average reading DC ammeter. Instantaneous current peaks will exceed these values.
[2] A droop of up to -10% is permissible during the T2 portion of power up (see Figure 7.2.2-1).
[3] This condition occurs when the Motor Start Option is enabled and the drive has not yet received a Start
Motor command.
[4] See paragraph 7.2.1 “Conducted Noise Immunity”.
[5] Peaks of 0.90 A (nominal) on +12 V will occur for no more than 100 ms total during the first 250 ms after
power is applied.
[6] Instantaneous peaks in excess of these values and less than 5 msec. in duration are allowed.
General Notes from Table 7.2-1:
1. At powerup, the motor current regulator limits the 12 volt current to a peak value of less than 1.9
amperes, although instantaneous peaks may occur as stated in [7] above.
2. Operating condition is defined as random seek read of 64 blocks.
3. Minimum operating current loading for each supply voltage is not less than 38% of the maximum operating
current shown.
4. The +5 and +12 volt supplies shall employ separate ground returns.
5. Where power is provided to multiple drives from a common supply, careful consideration for individual drive
power requirements should be noted. Where multiple units are powered on simultaneously, the peak
starting current must be available to each device.
7.2.1
Conducted noise immunity
Noise is specified as a periodic and random distribution of frequencies covering a band from DC to 10 mHz.
Maximum allowed noise values given below are peak to peak measurements and apply at the drive power
connector.
+5 V =
+12 V =
150 mV pp from 0 to 50 kHz and 45 mA pp from 50 kHz to 10 mHz.
150 mV pp from 0 to 50 kHz and 60 mA pp from 50 kHz to 10 mHz.
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
19
_____________________________________________________________________________________
7.2.2
Power sequencing
The drive does not require power sequencing. The drive protects against inadvertent writing during power up
and down. Daisy-chain operation requires that power be maintained on the terminated drive to ensure proper
termination of the peripheral I/O cables.
7.2.3
12 V - current profile
Figure 7.2.2-1 identifies the drive +5 V and +12 V current profile. The current during the various times is as
shown:
T -Power is applied to the drive.
T1 -Controller self tests are performed.
T2 -Spindle begins to accelerate under current limiting after performing drive internal diagnostics. See Note
1 of Table 7.2-1.
T3 -The spindle is up to speed and the Head-Arm restraint is unlocked.
T4 -The heads move from the landing zone to the data area.
T5 -The adaptive calibration sequence is performed.
T6 -Calibration is complete and the drive is ready for reading and writing.
Note.
All times and currents are typical. See Table 7.2-1 for maximum current
requirements.
2.5
T3
T1
T4
T2
T5
T6
2.0
1.5
12V
Current
(amps)
1.0
0.5
0
2
4
6
8
10
Seconds
12
14
16
0
2
4
6
8
10
Seconds
12
14
16
18
20
0.8
0.6
5V
Current
(amps)
0.4
0.2
Figure 7.2.2-1. Typical Hawk 2LP family drive +5 V and +12 V current profile
18
20
20
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
_____________________________________________________________________________________
7.3
Heat/power dissipation
For drives with single ended interface circuits, typical operating random read power dissipation is 9.0 watts
(30.8 BTUs per hour) of DC power average at nominal voltages. Typical power dissipation under idle conditions
is 6.0 watts (20.5 BTUs per hour).
For drives with differential interface circuits, typical operating random read power dissipation is 9.5 watts (32.5
BTUs per hour) of DC power average at nominal voltages. Typical power dissipation under idle conditions is
6.75 watts (23.1 BTUs per hours).
7.4
Environmental limits
Temperature and humidity values experienced by the drive must be such that condensation does not occur
on any drive part. Altitude and atmospheric pressure specifications are referenced to a standard day at 58.7°F
(14.8°C). Maximum Wet Bulb temperature is 82°F (28°C).
7.4.1
Temperature
a. Operating
The drive meets all specifications over a 41°F to 131°F (5°C to 55°C) drive ambient temperature range with
a maximum gradient of 36°F (20°C) per hour. The enclosure for the drive should be designed such that
the temperatures at the locations specified in Table 7.4.1-1, column 1 are not exceeded. Air flow may be
needed to achieve these temperature values. Operation at case temperatures above these values may
adversely affect the drives ability to meet specifications.
The MTBF specification for the drive is based on operating at an ambient temperature of 95°F (35°C).
Occasional excursions to drive ambient temperatures of 55°C or 5°C may occur without impact to specified
MTBF. To achieve the specified MTBF, the values of Table 7.4.1-1 Column 2 must be considered
maximum average operating case temperatures. Air flow may be needed to achieve these temperatures.
Continual or sustained operation at case temperatures above these values may degrade MTBF.
Table 7.4.1-1. PCB and HDA temperatures
Items
in
Figure
7.4.1-1
HDA
U2
U31
U17
U5
U3
Column 1
Maximum Case
Temperatures (°C)
Operating (55° Ambient) [2]
65
88
100
101
98
91
Column 2
Typical Case
Temperatures (°C)
at 35°C Ambient [1]
45
68
59
60
58
54
Note.
[1] The temperatures shown in Colummn 2 were measured on an unmounted drive lying on its side during
random write/reads at 100% duty cycle in still air.
[2] The temperatures in Column 1 are calculated and may not reflect actual operating values. Sufficient cooling
air may be required to ensure that these values are not exceeded.
b. Non-Operating
-40° to 158°F (-40° to 70°C) package ambient with a maximum gradient of 45°F (25°C) per hour. This
specification assumes that the drive is packaged in the shipping container designed by Seagate for use
with drive.
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
21
_____________________________________________________________________________________
HDA
SE
AG
AT
E
Model ST32430N/ST31230N
Single Ended I/O PCB *
Model ST32430ND/ST31230ND
Differential I/O PCB *
U15
U15
U17
U2
U2Ø
U16
U2Ø
U7
U3
U11
U2
U17
U16
U7
U3
Q13
U31
Q13
U31
U11
Q4
U1
U1
Q1
Q1
Q2
Q2
U4
U4
U25
U1Ø
U1Ø
U25
J1
J1
Bottom side of PCB
Figure 7.4.1-1. Locations of components listed in table 7.4.1-1.
7.4.2
U13
U5
*
Relative humidity
The values below assume that no condensation on the drive occurs.
a. Operating
8% to 80% relative humidity with a maximum gradient of 10% per hour.
b. Non-Operating
5% to 95% relative humidity.
Q4
U14
22
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
__________________________________________________________________________________________
7.4.3
Effective altitude (sea level reference)
a. Operating
-1000 to +10,000 feet (-305 to +3048 metres)
b. Non-Operating
-1000 to +40,000 feet (-305 to +12,210 metres)
7.4.4
Shock and vibration
Shock and vibration limits specified in this document are measured directly on the drive chassis. If the drive
is installed in an enclosure to which the stated shock and/or vibration criteria is applied, resonance’s may occur
internally to the enclosure resulting in drive movement in excess of the stated limits. If this situation is apparent,
it may be necessary to modify the enclosure to minimize drive movement.
The limits of shock and vibration defined within this document are specified with the drive mounted by any of
the four methods shown in Figure 7.4.4-1. Orientation of the side nearest the LED may be up or down.
7.4.4.1
Shock
a. Operating
The drive, as installed for normal operation, shall operate error free while subjected to intermittent shock
not exceeding 10 g’s at a maximum duration of 11 ms (half sinewave). Shock may be applied in the X, Y,
or Z axis.
b. Nonoperating
The limits of nonoperating shock shall apply to all conditions of handling and transportation. This includes
both isolated drives and integrated drives.
The drive subjected to nonrepetitive shock not exceeding 75 g’s at a maximum duration of 11 ms (half
sinewave) shall not exhibit device damage or performance degradation. Shock may be applied in the X,
Y, or Z axis.
c.
Packaged
The drive as packaged in a single or multiple drive pack of gross weight 20 pounds (8.95 kg) or less by
Seagate for general freight shipment shall withstand drop test from heights listed below against a concrete
floor or equivalent. For additional details refer to specifications 30190-001 (under 100 lbs) or 30191-001
(over 100 lbs).
Package Size
Drop Height
48 in (121 cm)
600 - 1800 in3 (9,832 - 29,502 cm3)
>1800 in3 (>29,502 cm3)
42 in (106 cm)
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
23
_____________________________________________________________________________________
SE
AG
AT
E
B1
B1
B
A1
B
A1
A
E
A
X
Z
E1
D
C
D1
C1
E1
SE
AG
AT
E
D1
C1
Z
Y
E
X
D
C
Figure 7.4.4-1. Recommended mounting
Y
24
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
_____________________________________________________________________________________
7.4.4.2
Vibration
a. Operating
The drive as installed for normal operation, shall comply with the complete specified performance while
subjected to continuous vibration not exceeding
5-22 Hz @ 0.020 inches (0.51 mm) displacement
22-400 Hz @ 0.5 g
Vibration may be applied in the X, Y, or Z axis.
b. Nonoperating
The limits of nonoperating vibration shall apply to all conditions of handling and transportation. This
includes both isolated drives and integrated drives.
The drive shall not incur physical damage or degraded performance as a result of continuous vibration not
exceeding
5-22 Hz @ 0.081 inches (2.05 mm) displacement
22-400 Hz @ 2.00 g
Vibration may be applied in the X, Y, or Z axis.
7.4.5
Air cleanliness
The drive is designed to operate in a typical office environment with minimal environmental control.
7.5
Electromagnetic compatibility
7.5.1
Electromagnetic susceptibility
As a component assembly, the drive is not required to meet any susceptibility performance requirements. It
is the responsibility of the system integrator to perform those tests required to ensure that equipment operating
in the same system as the drive does not adversely affect the performance of the drive. See section 6.1.2, and
see Table 7.2-1, DC Power Requirements.
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
25
_____________________________________________________________________________________
7.6
Mechanical specifications
The following nominal dimensions are exclusive of the decorative front panel accessory. However, dimensions
of the front panel are shown in figure below. Refer to Figure 7.6-1 for detailed mounting configuration
dimensions. See section 7.6.3, Drive mounting.
Height:
Width:
Depth:
Weight:
1.00 in
4.00 in
5.74 in
1.5 pounds
25.4
101.6
145.8
0.68
mm
mm
mm
kilograms
[4]
C
[3]
G
L
D
[1]
F
E
A
Notes:
[1] Mounting holes three on each side, 6-32 UNC. Max
screw length into side of drive 0.15 in. (3.81 mm).
Screw tightening torque 6.0 in-lb (.675 NM) max with
minimum thread engagement of 0.12 in. (3.05 mm).
[2] Mounting holes four on bottom, 6-32 UNC. Max
screw length into bottom of drive 0.20 in. (5.08 mm).
Screw tightening torque 6.0 in-lb (.675 NM) max with
minimum thread engagement of 0.12 in. (3.05 mm).
B
J
[3] Power and interface connectors can extend
past the "A" dimension by 0.040 in. (1.02 mm).
[4] Decorative front panel (optional).
[2]
A
B
C
H
D
E
F
G
K
P
N
[4]
M
Figure 7.6-1. Mounting configuration dimensions
H
J
K
L
M
N
P
Inches
5.74 ± .010
4.00 ± .010
1.00 + .026
– .010
2.362 ± .010
.620 ± .010
4.000 ± .010
.250 + .010
– .005
1.750 ± .010
3.750 ± .010
2.370 ± .010
1.00 ± .010
4.000 ± .010
0.19 ± .010
0.015 max
Millimeters
145.80 ± .25
101.60 ± .25
25.40 + .66
– .25
60.00 ± .25
15.75 ± .25
101.60 ± .25
6.35 + .25
– .12
44.45 ± .25
95.25 ± .25
60.20 ± .25
25.4 ± .25
101.6 ± .25
4.83 ± .25
0.381 max
26
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
________________________________________________________________________________________
7.6.1
Drive orientation
The balanced rotary arm actuator design of the drive allows it to be mounted in any orientation. All drive
performance characterization, however, has been done with the drive in horizontal (discs level) and vertical
(drive on its side) orientations, and these are the two preferred mounting orientations.
7.6.2
Cooling
Cabinet cooling must be designed by the customer so that the ambient temperature immediately surrounding
the drive will not exceed temperature conditions specified in 7.4.1. Specific consideration should be given to
make sure adequate air circulation is present around the PCBs to meet the requirements of 7.4.1. Cables
should be routed such that they do not block cooling air flow.
7.6.3
Drive mounting
When mounting the drive using the bottom holes care must be taken to ensure that the drive is not physically
distorted due to a stiff non-flat mounting surface. The allowable mounting surface stiffness is 80 lb/in (14.0
N/mm). The following equation and paragraph define the allowable mounting surface stiffness:
k * x = 80 lb (14.0 N)
where ‘k’ represents the mounting surface stiffness (units of lb/in or N/mm), and, ‘x’ represents the out-of-plane
mounting surface distortion (units of inches or millimeters). The out-of-plane distortion (‘x’) is determined by
defining a plane with three of the for mounting points fixed and evaluating the out-of-plane deflection of the
fourth mounting point when a known force is applied to the fourth point.
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
27
_____________________________________________________________________________________
8.0
Media characteristics
8.1
Media description
The media used on the drive has a diameter of approximately 3.7 inches (95 mm). The aluminum substrate
is coated with a thin film magnetic material, overcoated with a proprietary protective layer for improved durability
and environmental protection.
28
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
_____________________________________________________________________________________
9.0
Defect and error management
The drive, as delivered, complies with this specification. The read error rate and specified storage capacity are
not dependent upon use of defect management routines by the host (initiator).
Defect and error management in the SCSI system involves the drive internal defect/error management and
SCSI systems error considerations (errors in communications between Initiator and the drive). Tools for use
in designing a defect/error management plan are briefly outlined in this section, with references to other
sections where further details are given.
9.1
Drive internal defects/errors
Identified defects are recorded on the drive defects list tracks (referred to as the primary or ETF defect list).
These known defects are reallocated during the initial drive format operation at the factory. (See Format Unit
command Section 5.2.1.2 in SCSI Interface Product Manual*). Data correction by ECC will be applied to
recover data from additional flaws if they occur.
Details of the SCSI commands supported by the drive are described in SCSI Product Interface Manual*.
Also, more information on the drive Error Recovery philosophy is presented in Section 6 of the SCSI Interface
Product Manual.
9.2
SCSI systems error considerations
Information on the reporting of operational errors or faults across the interface is given in the SCSI Interface
Product Manual. Message Protocol System is described in the SCSI Interface Product Manual*. Several of the
messages are used in the SCSI systems error management system. The Request Sense command returns
information to the host about numerous kinds of errors or faults. The Receive Diagnostic Results reports the
results of diagnostic operations performed by the drive.
Status returned by the drive to the Initiator is described in the SCSI Interface Manual*. Status reporting plays
a role in the SCSI systems error management and its use in that respect is described in sections where the
various commands are discussed.
__________
*SCSI Interface Product Manual P/N 77738479.
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
29
_____________________________________________________________________________________
10.0
Option/configuration headers
10.1
Drive ID/option select header
Figure 10.1-1 shows a bottom view of the drive (PCB toward viewer) for the purpose of showing the drive ID
select and configuration option select jumper connectors. The notes following the figures describe the functions
of the various jumper positions on the 3 connectors J2, J5 and J6. Suggested part numbers for the jumpers
used on J2 is Molex 52747-0211 (Seagate P/N 77679052).
Side View of Drive
Pin 1
SCSI I/O
Connector
HDA
Pin 1
End
J1
Drive with HDA up,
PCB down, viewed
from front
J5
A0 A1 A2
Pin 1
J5
J6
HDA
SCSI ID = 0
J1
Pin 1
Drive Front
SCSI ID = 1
J6
SCSI ID = 2
DC Power
Connector
R L R
Reserved
E E E
A2 A1 A0 S D S
SCSI ID = 3
J2
SCSI ID = 0
SCSI ID = 4
Pin 1
J2
SCSI ID = 1
Jumper
Positions
Enable
Terminators
SCSI ID = 5
SCSI ID = 2
SCSI ID = 6
SCSI ID = 3
SCSI ID = 4
Enable Motor Start
SCSI ID = 5
Write Protect
M W
E P
P
E
S
S
T
P
T
P
[2]
Parity Option
SCSI ID = 6
Useage Reserved
[3]
Term. Power
from Drive
[2]
SCSI ID = 7
Reserved
Shipped with cover installed.
Do not remove.
Do not install jumpers
on these four positions.
D
S
Delay Motor Start
SCSI ID = 7
Remote
LED
T
E
Term. Power
to SCSI Bus
3
4
Term. Power
from SCSI Bus
[2]
Position A
CATH
Figure 10.1-1. Hawk 2LP family drive ID and option select header
Notes for Figure 10.1-1.
[1] Notes explaining the functions of the various jumpers on jumper header connectors J2, J5 and J6 are given
below in left to right order of jumper position. The term “default” means as standard OEM units are
configured when shipped from factory. “Off” means no jumper is installed; “On” means a jumper is installed.
Off or on underlined is factory default condition.
[2] "ND" models do not have terminators on the drive PCB, so these jumpers are not applicable.
[3] Reserved usage. Do not install a jumper.
30
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
_____________________________________________________________________________________
J2
Jumper
Installation
TE
On
Jumper Function Description
(Applies only to "N" models)
With the jumper installed, the On-board (non-removable) terminator circuits are enabled
(connected to the I/O lines). Default is jumper installed.
Terminator circuits not connected to I/O lines.
Off
DS
Off
Off
On
ME
Off
On
Off
On
On
WP
On
Off
Spindle starts immediately after power up - Default setting.
Drive spindle does not start until Start Unit command received from host.
Spindle Startup is delayed by SCSI ID times 12 seconds after power is applied, i.e., drive 0
spindle starts immediately when DC power connected, drive 1 starts after 12 second delay,
drive 2 starts after 24 second delay, etc.
Drive spindle starts when Start Unit command received from host. Delayed start feature is
overridden and does not apply when ME jumper is installed.
Entire drive is write protected.
Drive is not write protected. Default is no WP jumper installed.
PE
On
Off
Parity checking and parity error reporting by the drive is enabled. Default is PE jumper
installed.
Drive does not report result of parity checking to host.
SS
Off
Reserved jumper position. Default is no jumper installed.
TP
Off
On
Off
TP
Off
Off
On
On
On
No terminator power is connected to drive terminators or SCSI bus I/O pin 26.
Drive supplies its own terminator power only. Jumper on this position is factory default.
Drive supplies power to I/O pin 26 of SCSI bus; none to internal terminators. When drives have
differential I/O circuits, a jumper on the right TP position may be needed to power external
terminators (see system documentation). The "ND" drive has differential I/O circuits which
have no terminator circuits on the drive.
Drive supplies terminator power to itself (internal connection) and to I/O pin 26 of SCSI bus.
This is a legal jumper setting.
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
31
_____________________________________________________________________________________
continued from previous page
TP Position A (Applies to "N" models only)
On
This horizontally positioned jumper across the two TP positions nearest PCB edge, connects
terminator power from SCSI bus I/O pin 26 to the drive’s internal terminators (for single-ended
I/O only).
Off
See above explanations for TP jumpers.
J5
Jumper
Installation
A0,A1,A2
J6
Jumper
Installation
A2,A1,A0
LED
10.2
Drive ID on SCSI Bus (J6 may be used instead, as J5 and J6 are in parallel. Use only one
set for drive ID). The drive ID is binary coded positionwise i.e., jumper in position A2 is drive
ID 4, in position A1 is ID 2, position A0 is ID 1 and no jumpers is ID 0. Default is ID = 0.
Drive ID on SCSI bus. Either J5 or J6 (optional) may be used to select drive ID. Both should
not be used at the same time, because at some future time when the ID is changed the user
could fail to configure both J5 and J6 the same. Default is ID = 0.
No jumper ever installed. These pins used to connect a cable for a remote LED indicator. Pin
3 (top, nearest HDA), the anode connection, connects in the drive to the +5V supply through
a pull-up resistor. Pin 4 (bottom), the cathode connection connects in the drive to signal
common through the emitter-collector junction of a transistor switch that controls the LED on/
off condition.
Grounding
Signal ground (PCB) and HDA ground are connected together in the drive and cannot be separated by the user.
The equipment in which the drive is mounted is connected directly to the HDA and PCB with no electrically
isolating shock mounts. If it is desired for the system chassis to not be connected to the HDA/PCB ground, the
systems integrator or user must provide a nonconductive (electrically isolating) method of mounting the drive
in the host equipment.
32
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
_____________________________________________________________________________________
11.0
Interface requirements
11.1
General description
This section partially describes the interface requirements as implemented on the drives. The major portion
of the interface requirements/implementation is described in the Seagate SCSI Interface Product Manual,
P/N 77738479. This section has tables that give the Hawk 2LP Family drives version of the SCSI
implementation described in the 77738479 document.
11.2
SCSI interface messages supported
Table 11.2-1 following lists the messages supported by the SCSI-1, SCSI-2 and SCSI-3 modes of the Hawk
2LP Family drives.
Table 11.2-1. SCSI messages supported by Hawk 2LP family drives
Msg
Code
01h[1]
06h
0Dh
0Ch
0Eh
00h
12h
04h
80h-FFh
23h
0Fh
05h
0Ah
0Bh
09h
07h
[1]
08h
Supported by:
SCSI-1
Y
Y
Y
Y
Y
Y
Y
Y
Y
N
N
Y
N
N
Y
Y
N
Y
SCSI-2/3
Y
Y
Y
Y
Y
Y
Y
Y
Y
N
N
Y
N
N
Y
Y
N
Y
21h
22h
20h
10h
03h
02h
[1]
13h
11h
[1]
Y
Y
Y
N
Y
Y
Y
Y
N
N
Y
Y
Y
N
Y
Y
Y
Y
N
N
Message Name
Extended Messages
Abort
Abort-tag
Bus device reset
Clear queue
Command complete
Continue I/O process
Disconnect
Identify
Ignore wide residue (two bytes)
Initiate recovery
Initiator detected error
Linked command complete [2]
Linked command complete with flag [2]
Message parity error
Message reject
Modify data pointer
No operation
Queue tag messages (two bytes)
Head of queue tag
Ordered queue tag
Simple queue tag
Release recovery
Restore pointers
Save data pointer
Synchronous data transfer req.
Target transfer disable
Terminate I/O process
Wide data transfer request
Notes.
[1] Extended messages (see P/N 77738479 SCSI Interface Product Manual).
[2] Customer Unique.
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
33
_____________________________________________________________________________________
11.3
SCSI interface commands supported
Table 11.3-1 following lists the SCSI interface commands that are supported in the SCSI-1, SCSI-2 and SCSI3 modes of the drive. Hawk 2LP Family drives can be changed back and forth between SCSI-1 and SCSI-2/
SCSI-3 modes using the Change Definition Command. OEM standard drives are shipped set to operate in
SCSI-2/SCSI-3 mode.
Table 11.3-1. Commands supported by Hawk 2LP family drives
Com’d
Code
00h
01h
03h
04h
07h
08h
0Ah
0Bh
12h
15h
16h
17h
18h
1Ah
Supported by:
SCSI-1
Y
Y
Y
Y
Y
Y
Y
Y
N
Y
Y
N
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
N
Y
SCSI-2/3
Y
Y
Y
Y
Y
Y
Y
Y
N
Y
Y
N
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
N
Y
N
Y
Y
Y
Y
Y
Y
Y
Y
N
Y
N
N
Y
Y
N
Y
N
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Command Name
Test unit ready
Rezero unit
Request sense
Extended sense
Field pointer bytes
Actual retry count bytes
Deferred error supported
Format unit [1]
Block format
Bytes from index format
Physical sector format
DPRY bit supported
Reassign blocks
Read
Write
Seek
Inquiry
Vital product data page
Unit serial number page
Implemented operating def page
Firmware numbers page
Date code page
Jumper settings page
Device Behavior page
Mode select (same pages as mode
Sense command, see below)
Reserve
3rd party reserve
Extent reservation
Release
Copy
Mode sense
Unit attention page (00h)
Byte 2 bit 4 (unit attn bit)
Byte 2 bit 5 (DEID bit)
Error recovery page (01h)
Disconnect/reconnect (02h)
Format page (03h)
Rigid disc drive geometry page (04h)
Verify error recovery page (07h)
Caching parameters page (08h)
Control mode page (0Ah)
Notch and Partition Page (0C)
[1] The drive can format to any even number of bytes per sector from 256 to 4096.
34
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
_____________________________________________________________________________________
continued from previous page
Com’d’
Code
1Bh
1Ch
1Dh
25h
28h
2Ah
2Bh
2Eh
2Fh
30h
31h
32h
33h
34h
35h
36h
37h
39h
3Ah
3Bh
3Ch
3Eh
3Fh
40h
41h
42-4Bh
4Ch
4Dh
4E-54h
55h
56h
57h
58-59h
5Ah
5B-5Fh
60-BFh
C0-DFh
E0-FFh
Supported by:
SCSI-1
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
N
N
N
N
N
Y
N
Y
N
N
Y
Y
Y
Y
Y
N
N
Y
Y
N
Y
Y
Y
N
Y
N
N
N
N
SCSI-2/3
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
N
N
N
N
N
Y
N
Y
N
N
Y
Y
Y
Y
Y
N
N
Y
Y
N
Y
Y
Y
N
Y
N
N
N
N
Command Name
Start unit/stop unit (spindle ceases rotating)
Receive diagnostic results
Supported diagnostics pages
Translate page
Send diagnostics page
Supported diagnostics pages
Translate page
Read capacity
Read extended
Write extended
Seek extended
Write and verify
Verify
Search data high
Search data equal
Search data low
Set limits
Prefetch
Synchronize cache
Lock-unlock cache
Read defect data
Compare
Copy and verify
Write buffer
Read buffer
Read long
Write long
Change definition
Write same
Not used
Log select
Log sense
Not used
Mode select (10)
Reserve (10)
Release (10)
Not used
Mode sense (10)
Not used
Not used
Not used
Not used
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
35
______________________________________________________________________________________
11.3.1
Inquiry data
11.3.1.1
Standard Inquiry data
Table 11.3.1-1 following lists the Standard Inquiry command data that the drive should return to the initiator
per the format given in the SCSI-2 Interface Product Manual P/N 77738479, section 5.1.1.3.
Table 11.3.1-1. Hawk 2LP family drive Standard Inquiry data
Bytes
Data (HEX)
0-15
00 00 ** *** 8F 00 00 12 53 45
16-31
53 54 [33][32][34][33][30][4E][20] 20
32-47
R# R# R# R# S# S# S# S# S# S#
48-63
00 00 00 00 00 00 00 00 00 00
64-79
00 00 00 00 00 00 00 00 00 00
80-95
00 00 00 00 00 00 00 00 00 00
96-111
00 43 6F 70 79 72 69 67 68 74
112-127
39* 39* 33* 20 53 65 61 67 61 74
128-143
72 69 67 68 74 73 20 72 65 73
144-148
D# D# D# D#
*Copyright Year - changes with actual year.
41
20
S#
00
00
00
20
65
65
47
20
S#
00
00
00
28
20
72
41
20
00
00
00
00
63
41
76
54
20
00
00
00
00
29
6C
65
45
20
00
00
00
00
20
6C
64
20 VENDOR ID
20 PRODUCT ID
00
00
00
00
31* *COPYRIGHT
20
NOTICE
20
Notes.
**
***
R#
S#
D#
[]
01 means SCSI-1 implemented;
02 means SCSI-2/SCSI-3 implemented. Hawk 2LP Family drives can be changed between these two
configurations. Default is 02.
01 means response data is in SCSI-1 format and has compatibility with Common Command Set data.
02 means response data is in SCSI-2/SCSI-3 format (some SCSI-3 features are also supported). The
drive can be changed between these two configurations. Default is 02.
Four ASCII digits representing the last four digits of the product Firmware Release number. This
information is also given in the Vital Product data page C0h, together with servo RAM and ROM release
numbers.
Eight ASCII digits representing the eight digits of the product serial number.
Four ASCII digits representing the firmware distribution diskette serial number.
Bytes 18 through 24 will reflect model of drive. Shown here are hex values for Model ST32430N. Values
for ST31230N are 33 31 32 33 30 4E 20.
For model ND byte 24 is 44 (D).
11.3.1.2
Inquiry Vital Product data
Instead of the standard Inquiry data shown in Table 11.3.1-1, the initiator can request several Vital Product Data
pages by setting the Inquiry command EVPD bit to one. The SCSI, Version 2 Interface Product Manual P/N
77738479, section 5.1.1.3.1 lists the Vital Product Data pages supported and describes their formats. A
separate Inquiry command must be sent to the drive for each Vital Product Data page the initiator wants the
drive to send back.
36
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
______________________________________________________________________________________
11.3.2
Mode Sense data
The Mode Sense command provides a means for the drive to report its operating parameters to the initiator.
The drive maintains four sets of Mode parameters, Default values, Saved values, Current values and
Changeable values.
Default values are hard coded in the drive firmware that is stored in flash E-PROM nonvolatile memory on the
drive PCB. Default values can be changed only by downloading a complete set of new firmware into the flash
E-PROM. An initiator can request and receive from the drive a list of Default values and use those in a Mode
Select command to set up new Current and Saved values.
Saved values are stored on the disk media using a Mode Select command. Only parameter values that are
allowed to be changed can be changed by this method. See “Changeable values” defined below. Parameters
in the Saved values list that are not changeable by the Mode Select command get their values from the Default
values storage.
Current values are volatile values currently being used by the drive to control its operation. A Mode Select
command can be used to change these values (only those that are changeable). Originally, they are installed
from Saved or Default values after a power on reset, hard reset, or Bus Device Reset message.
Changeable values form a bit mask, stored in nonvolatile memory, that dictates which of the Current values
and Saved values can be changed by a Mode Select command. A “one” allows a change to a corresponding
bit; a “zero” allows no change. For example, in Table 11.3.2-1 refer to Mode page 01, in the first row entitled
“CHG”. These are hex numbers representing the changeable values for Mode page 01. Note in columns 1 and
2 (bytes 00 and 01), there is 00h, which indicates that in bytes 00 and 01 none of the bits are changeable. Note
also that bytes 04, 05, 06 and 07 are not changeable, because those fields are all zeros. In bytes 02, hex value
FF equates to the binary pattern 1111 1111. If there were a zero in any bit position in the field, it would mean
that bit is not changeable. However, bits 7 - 0 are changeable, because those bits are all ones. In this particular
case, it indicates 8 error recovery control bits are all changeable. FF in column 4 indicates all bits in byte 3 are
changeable.
The Changeable values list can only be changed by downloading new firmware into the flash E-PROM.
On drives requiring unique Saved values, the required unique Saved values are stored into the Saved values
storage location on the media prior to shipping the drive. Some drives may have unique firmware with unique
Default values also.
On standard OEM drives the Saved values are taken from the Default values list and stored into the Saved
values storage location on the media prior to shipping.
When a drive is powered up, it takes Saved values from the media and stores them to the Current values storage
in volatile memory. It is not possible to change the Current values (or the saved values) with a Mode Select
command before the drive is up to speed and is “ready.” An attempt to do so results in a “Check Condition” status
being returned.
Note.
Because there may be several different versions of drive control firmware in the total population of drives in
the field, the Mode Sense values given in the following tables may not exactly match those of some drives.
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
37
_____________________________________________________________________________________
The following tables list the values of the data bytes returned by the drive in response to the Mode Sense
command pages for SCSI-1 and SCSI-2/SCSI-3 implementation (see SCSI Interface Product Manual, P/N
77738479).
Definitions:
DEF
CHG
= Default value. Standard drives are shipped configured this way.
= Changeable bits; indicates if current and saved values are changeable.
Table 11.3.2-1a. Mode sense data, ST32430N/ND default values (SCSI-1 implementation)
Bytes 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Mode
Sense 63 00 10 08
Data 00 00 00 00 00 00 02 00
Mode
Page
MODE PAGE HEADERS AND PARAMETER DATA BYTES
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23
DEF
01
CHG
01
DEF
02
CHG
02
DEF
03
CHG
03
DEF
04
CHG
04
DEF
08
CHG
08
DEF
00
CHG
00
81 06 00 28 30 00 00 FF
00 00 EF FF 00 00 00 00
82 0A 80 80 00 0A 00 00 00 00 00 00
00 00 FF FF 00 00 00 00 00 00 00 00
83 16 00 09 00 08 00 00 00 12 00 75 02 00 00 01 00 0C 00 19 40 00 00 00
00 00 FF FF FF FF 00 00 FF FF 00 00 00 00 00 00 00 00 00 00 00 00 00 00
84 12 00 0F 98 09 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
88 12 14 00 FF FF 00 00 FF FF FF FF 80 03 00 00 00 00 00 00
00 00 BD 00 FF FF FF FF FF FF 00 00 A0 FF 00 00 00 00 00 00
80 02 00 00
00 00 76 00
38
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
_____________________________________________________________________________________
Table 11.3.2-1b. Mode sense data, ST31230N/ND default values (SCSI-1 implementation)
Bytes 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Mode
Sense 63 00 10 08
Data 00 00 00 00 00 00 02 00
Mode
Page
MODE PAGE HEADERS AND PARAMETER DATA BYTES
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23
DEF
01
CHG
01
DEF
02
CHG
02
DEF
03
CHG
03
DEF
04
CHG
04
DEF
08
CHG
08
DEF
00
CHG
00
81 06 00 28 30 00 00 FF
00 00 EF FF 00 00 00 00
82 0A 80 80 00 0A 00 00 00 00 00 00
00 00 FF FF 00 00 00 00 00 00 00 00
83 16 00 05 00 05 00 00 00 0A 00 68 02 00 00 01 00 0A 00 15 40 00 00 00
00 00 FF FF FF FF 00 00 FF FF 00 00 00 00 00 00 00 00 00 00 00 00 00 00
84 12 00 0F 98 05 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
88 12 14 00 FF FF 00 00 FF FF FF FF 80 03 00 00 00 00 00 00
00 00 BD 00 FF FF FF FF FF FF 00 00 A0 FF 00 00 00 00 00 00
80 02 00 00
00 00 76 00
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
39
____________________________________________________________________________________________
Table 11.3.2-2a. Mode sense data, ST32430N/ND default values (SCSI-2/3 implementation)
Bytes 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Mode 87 00 10 08
Sense 00 00 00 00 00 00 02 00
Data
Mode
Page
MODE PAGE HEADERS AND PARAMETER DATA BYTES
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23
DEF
01
CHG
01
DEF
02
CHG
02
DEF
03
CHG
03
DEF
04
CHG
04
DEF
07
CHG
07
DEF
08
CHG
08
DEF
0A
CHG
0A
DEF
00
81 0A 00 28 30 00 00 00 18 00 FF FF
00 00 EF FF 00 00 00 00 FF 00 00 00
82 0E 80 80 00 0A 00 00 00 00 00 00 00 00 00 00
00 00 FF FF 00 00 00 00 00 00 00 00 80 00 00 00
83 16 00 09 00 08 00 00 00 12 00 75 02 00 00 01 00 0C 00 19 40 00 00 00
00 00 FF FF FF FF 00 00 FF FF 00 00 00 00 00 00 00 00 00 00 00 00 00 00
84 16 00 0F 98 09 00 00 00 00 00 00 00 00 00 00 00 00 00 00 15 23 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
87 0A 00 28 30 00 00 00 00 00 FF FF
00 00 0F FF 00 00 00 00 00 00 00 00
88 12 14 00 FF FF 00 00 FF FF FF FF 80 03 00 00 00 00 00 00
00 00 BD 00 FF FF FF FF FF FF 00 00 A0 FF 00 00 00 00 00 00
8A 0A 02 00 00 00 00 00 00 00 00 00
00 00 01 11 00 00 00 00 00 00 00 00
80
02 00 00
CHG
40
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
____________________________________________________________________________________________
Table 11.3.2-2b. Mode sense data, ST31230N/ND default values (SCSI-2/3 implementation)
Bytes 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Mode 87 00 10 08
Sense 00 00 00 00 00 00 02 00
Data
Mode
Page
MODE PAGE HEADERS AND PARAMETER DATA BYTES
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23
DEF
01
CHG
01
DEF
02
CHG
02
DEF
03
CHG
03
DEF
04
CHG
04
DEF
07
CHG
07
DEF
08
CHG
08
DEF
0A
CHG
0A
DEF
00
CHG
00
81 0A 00 28 30 00 00 00 18 00 FF FF
00 00 EF FF 00 00 00 00 FF 00 00 00
82 0E 80 80 00 0A 00 00 00 00 00 00 00 00 00 00
00 00 FF FF 00 00 00 00 00 00 00 00 80 00 00 00
83 16 00 05 00 05 00 00 00 0A 00 68 02 00 00 01 00 0A 00 15 40 00 00 00
00 00 FF FF FF FF 00 00 FF FF 00 00 00 00 00 00 00 00 00 00 00 00 00 00
84 16 00 0F 98 05 00 00 00 00 00 00 00 00 00 00 00 00 00 00 15 23 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
87 0A 00 28 30 00 00 00 00 00 FF FF
00 00 0F FF 00 00 00 00 00 00 00 00
88 12 14 00 FF FF 00 00 FF FF FF FF 80 03 00 00 00 00 00 00
00 00 BD 00 FF FF FF FF FF FF 00 00 A0 FF 00 00 00 00 00 00
8A 0A 02 00 00 00 00 00 00 00 00 00
00 00 01 11 00 00 00 00 00 00 00 00
80 02 00 00
00 00 76 00
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
41
_____________________________________________________________________________________
11.4
SCSI bus conditions and miscellaneous features supported
Asynchronous SCSI bus conditions supported by the drive are listed in Table 11.4-1. These conditions cause
the SCSI device to perform certain actions and can alter the phase sequence. Other miscellaneous operating
features supported are also listed here.
Table 11.4-1. SCSI bus conditions and other misc. features
Condition/Feature Supported by:
SCSI-1
Y
Y
Y
N
Y
Y
Y
Y
N
Y
Y
N
Y
Y
Y
Y
SCSI-2/SCSI-3
Y
Y
Y
N
Y
Y
Y
Y
N
Y
Y
N
Y
Y
Y
Y
N
N
N
N
[1]
Y
Y
N
Y
[1]
Y
Y
N
Y
SCSI-1
Y
Y
N
Y
[1]
N
Y
Y
SCSI-2/SCSI-3
Y
Y
N
Y
[1]
N
Y
Y
Conditions or Feature
Attention Condition
Reset Condition
Contingent Allegiance Condition
Asynchronous Event Notification
Arbitrating System
Disconnect/Reconnect
Asynchronous Data Transfer
Synchronous Data Transfer
Synchronized (locked) Spindle Operation
Differential Interface Circuits available
Segmented Caching
Zero Latency Read
Queue tagging (up to 64 Que tags supported)
Deferred Error Handling
Parameter Rounding
Reporting actual retry count in Extended Sense bytes
15, 16 and 17.
Adaptive Caching (available only on some drives)
SMP = 1 in Mode Select command needed to save
RPL and Rotational Offset bytes (in Table 5.2.1-25
of Vol. II).
Flag and Link bits in Control Byte supported
Immediate status on Start/Stop command
Immediate status on Format unit command
Immediate status on Synchronize Cache command
Format progress indication
Status Supported
Good
Check Condition
Condition Met/Good
Busy
Intermediate/Good
Intermediate/Condition Met/Good
Reservation Conflict
Queue Full
Notes.
[1] Option supported only if customer requests.
42
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
_____________________________________________________________________________________
11.5
Synchronous data transfer
11.5.1
Synchronous data transfer periods supported
Table 11.5-1 and 11.5-2 list Synchronous Data transfer periods supported by the drive. The data transfer period
to be used by the drive and the initiator is established by an exchange of messages during the Message Phase
of operation. See the section on message protocol in the SCSI Interface manual*.
Table 11.5-1. Synchronous data transfer periods for drive
M (Decimal)
25
31
37
50
62
75
87
100
11.5.2
Transfer period (M times 4 nanoseconds)
100
124
150
200
250
300
350
400
REQ/ACK offset
The maximum value supported by the Hawk 2LP Family drives for REQ/ACK offset is 15 (0Fh).
11.6
Physical interface
Figure 11.6-1 shows the locations of the physical interface components for the N/ND drives. Shown are the
locations of the D.C. power connector, the SCSI interface connector, the I/O line terminators, and the drive
select and option select header.
Details of the physical, electrical and logical characteristics are given in paragraphs following, while the SCSI
operational aspects of Seagate drive interfaces are given in the Seagate SCSI Interface Product Manual,
P/N 77738479.
__________
*SCSI Interface Product Manual, P/N 77738479
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
43
___________________________________________________________________________________________
Pin
1
2
3
4
Power
+12V
+12V ret
+ 5V ret
+ 5V
J1
4
Pin 1
3
2
1
DC Power
Connector
Pin 1
J2
J1
SCSI I/O Connector
J5
J6
Figure 11.6-1. Physical interface
44
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
_____________________________________________________________________________________
11.6.1
DC cable and connector
The drive receives DC power through a 4 pin connector (see Figure 11.6-1 for pin assignment) mounted at the
rear of the main PCB. Recommended part numbers of the mating connector are listed below, but equivalent
parts may be used (see Table 11.6-1).
Table 11.6.1-1. Mating connector parts
11.6.2
Type of Cable
Connector
Contacts (20-14 AWG)
14 AWG
MP 1-480424-0
AMP 60619-4 (Loose Piece)
AMP 61117-4 (Strip)
Physical characteristics
This section defines the connectors, cables, signals, terminators and bus timing needed to implement SCSI.
11.6.2.1
Physical description
The drives may be daisy-chained together or with other compatible SCSI devices using a common cable. Both
ends of the cable must be terminated. The "N" model drive implements single ended drivers and receivers.
The "ND" model drive implements differential drivers and receivers. All signals are common between all SCSI
devices. The drive may be daisy-chained only with SCSI devices having the same type drivers and receivers.
Devices having single ended interface circuits cannot be on the same daisy-chain with devices having
differential interface circuit. A maximum of 8 SCSI devices (including the Host) may be daisy-chained together.
The SCSI Devices at both ends of the daisy-chain are to be terminated. Intermediate SCSI devices shall not
be terminated (see Figure 11.6.3-2). Remove the terminator enable jumper TE on J2 select header ("N"
models), or the external terminators ("ND" models), not the terminator power source selector jumper TP
(Figure 10.1-1).
11.6.2.2
Cable requirements
The maximum total cable length for use with drives having single ended I/O driver and receiver circuits shall
be 6 metres (19.7 ft.) when operating at line data transfer rates of 5 Mbytes/sec or less, and 3 metres (9.85
ft.) when operating at transfer rates greater than 5 Mbytes/sec (FAST SCSI). A stub length of no more than
0.1 metre (0.33 ft.) is allowed off the mainline interconnection with any connected equipment. An ideal
impedance match with cable terminators implies a cable characteristic impedance of 132 ohms. Single ended
I/O cable pin assignments are shown in Table 11.6.3-1.
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
45
_____________________________________________________________________________________
11.6.2.3
General cable characteristics
In general, cables having the characteristic impedance’s given in 11.6.2.2 are not available; however,
impedance’s that are somewhat lower are satisfactory. A characteristic impedance of 100 ohm ±10% is
recommended for unshielded flat or twisted pair ribbon cable. However, most available cables have a
somewhat lower characteristic impedance. To minimize discontinuances and signal reflections, cables of
different impedance’s should not be used in the same bus. Implementations may require trade-offs in shielding
effectiveness, cable length, the number of loads, transfer rates, and cost to achieve satisfactory system
operation. If shielded and unshielded cables are mixed within the same SCSI bus, the effect of impedance
mismatch must be carefully considered. Proper impedance matching is especially important in order to
maintain adequate margin at FAST SCSI transfer rates.
Only nonshielded cable connectors are applicable. A 50 conductor flat cable or 25 twisted pair cable shall be
used. A minimum conductor size of 28 AWG should be used to minimize noise effects.
Suggested nonshielded flat cable part numbers are:
Flat cable - 35M-3365-50
Twisted pair - Spectra Twist in flat 455-248-50
11.6.3
Mating connector requirements
11.6.3.1
Mating connectors for models N/ND
The nonshielded cable connector shall be a 50 conductor connector consisting of two rows of 25 male contacts
with adjacent contacts 100 mils apart.
Recommended mating flat cable connector part numbers are:
Closed end
(for cable
ends)*
3M-3425-7000
3M-3425-7050
Dupont-66900-290
W/O Strain Relief, No Center Key
With Strain Relief, No Center Key
With Strain Relief, With Center Key
Open end
3M-3425-6000
(In daisy-chain) 3M-3425-6050
Dupont-66900-250
W/O Strain Relief, No Center Key
With Strain Relief, No Center Key
With Strain Relief, With Center Key
*See Figure 11.6.3-2.
The drive device connector is a nonshielded 50 conductor connector consisting of two rows of 25 female pins
with adjacent pins 100 mils apart. The connector is keyed (see Figure 11.6.3-1).
11.6.3.2
Jumper plug part number for J2
Option select header connector J2 on the PCB (see Figure 10.1-1) uses an unusual type of jumper plug so its
part number is given here for reference. Suggested part no. for J2 jumper:
Molex 52747-0211 (Seagate P/N 77679052)
46
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
_____________________________________________________________________________________
.370 ± .010
(9.398)
.60
(15.24)
.42 Ref.
(10.67)
.20 Typ.
(5.08)
.065 x 45° Chamfer Typ.
(1.65)
.26 Typ.
(6.60)
Pin 1
.037 Ref. Typ.
(.94)
3 2
4
1
CL
.100
(2.54)
.025
(.64)
.335 ± .010
(8.50)
+.001
.083 –.002 Dia.
Sq. Contact
(2.1)
Trifurcated Pin
(4 places)
50 Places
.16
(4.06)
.100 Typ.
(2.54)
"D" ± .010
.051
(1.30)
.045 Min. Typ.
(1.14)
"C" ± .010
3
.834 ± .010
(21.18)
.040 Ref.
(1.02)
"B" Ref.
"A" ± .010
Figure 11.6.3-1. Nonshielded 50 pin SCSI device connector
No. Pos.
"A"
"B"
"C"
"D"
50
3.767
(95.68)
3.697
(93.90)
2.720
(69.09)
2.400
(60.96)
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
47
__________________________________________________________________________________________
SCSI Device
Host Adapter/Initiator
***
T
*
1 thru 8
SCSI Devices
**
Disc Drive or
Other SCSI
Device
**
*
Disc Drive or
Other SCSI
Device
T
Disc Drive or
Other SCSI
Device
VIEW B - T indicates termination required
Total interface cable length must not exceed that specified in paragraph
11.6.2.2. (including host adapter/initiator).
*
**
***
Closed end type connector used.
Open end type (in-line application) connector used.
Host need not be on the end of the daisy-chain. Another device can be
on the end with the terminator, the host having no terminator.
Figure 11.6.3-2. Interface cabling
Table 11.6.3-1a. Single ended, 50 pin cable pin assignments (Nonshielded connector) (N models)
Signal
-DB (0)
-DB (1)
-DB (2)
-DB (3)
-DB (4)
-DB (5)
-DB (6)
-DB (7)
-DB (P)
GROUND
GROUND
GROUND
TERMPWR
GROUND
Pin Number
2
4
6
8
10
12
14
16
18
20
22
24
26
28
Signal
GROUND
-ATN
GROUND
-BSY
-ACK
-RST
-MSG
-SEL
-C/D
-REQ
-I/O
Pin Number
30
32
34
36
38
40
42
44
46
48
50
Notes.
1. All odd pins except pin 25 are connected to ground. Pin 25 is left open.
Caution
Pin 25 must not be connected to ground at the HOST end or the drive end of the cable. If the I/O
connector should accidentally be plugged upside down, terminator power on pin 26 will be shorted to
ground.
2. The minus sign next to the signals indicates asserted state is the low voltage of the two levels used for logic
signals.
48
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
______________________________________________________________________________________
Table 11.6.3-1b. Differential cable pin assignments (Nonshielded connector) (ND models)
+Signal Name*
SHIELD GND
+DB(0)
+DB(1)
+DB(2)
+DB(3)
+DB(4)
+DB(5)
+DB(6)
+DB(7)
+DB(P)
DIFFSENS
GROUND
TERMPWR
GROUND
+ATN
GROUND
+BSY
+ACK
+RST
+MSG
+SEL
+C/D
+REQ
+I/O
+GROUND
*
Pin Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
-Signal Name*
GROUND
-DB(0)
-DB(1)
-DB(2)
-DB(3)
-DB(4)
-DB(5)
-DB(6)
-DB(7)
-DB(P)
GROUND
GROUND
TERMPWR
GROUND
-ATN
GROUND
-BSY
-ACK
-RST
-MSG
-SEL
-C/D
-REQ
-I/O
GROUND
See Paragraph 11.6.4.2 for detailed electrical characteristics of these differential signals.
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
49
______________________________________________________________________________________
11.6.4
Electrical description
Model "N" drives use single ended interface signals. These signals must be terminated with 110 ohm active
termination circuits at each end of the total cable. On "N" models, the terminators are enabled (or disabled) by
installing (or removing) jumper plug TE. See Figure 10.1-1. Single Ended circuits use open collector or three
state drivers. See Figure 11.6.4-1 and 11.6-1. The model NC has no provisions for terminators on the drive.
The "ND" model drives use differential interface signals and each of these must be terminated at each end of
the total cable with 330 ohms to +5 V and 330 ohms to ground with 150 ohms between each differential pair.
All I/O circuits are open collector, three state drivers. See Figure 11.6.4-2 for circuit drawing. Differential I/O
drives are shipped without terminators. These drives have no provisions for adding terminator sockets on the
PCB. On these drives some method of external termination must be provided by the drive user, systems
integrator or host equipment manufacturer.
11.6.4.1
Single ended drivers/receivers
For "N" models which use single ended drivers and receivers, typical circuits are shown in Figure 11.6.4-1.
Terminator circuits (Note [1]) are to be enabled (model N) only when the disc drive is first or last in the daisychain.
Transmitter Characteristics
Single ended drives use an ANSI SCSI compatible open collector single ended driver. This driver is capable
of sinking a current of 48 mA with a low level output voltage of 0.4 volt.
Receiver Characteristics
Single ended drives use an ANSI SCSI single ended receiver with hysteresis gate or equivalent as a line
receiver.
Line Driver
Transmitter
(or transceiver)
Line Receiver
[4]
[1]
TP
TP
[4]
110
Ohm
Flat
Cable
Pair
[1]
Receiver
110
Ohm
[3]
[2]
[2]
[1] Part of active terminator circuits. Non-removable LSI terminators, enabled in the drive (model "N" only) with
jumper plug TE when it is first of last in the daisy-chain. Interface signals levels and logical sense at the
drive I/O connector are defined as follows:
Logic Level
Driver Output
Receiver Input
>2.5 V: <5.25 V
>2.0 V: <5.25 V
NEGATED (0)
ASSERTED (1)
<0.4 V: >0.0 V
<0.8 V: >0. 0 V
The difference in the voltages between input and output signals is due to the losses in the cable.
[2] ANSI SCSI compatible circuits
[3] Total interface cable length should not exceed that specified in Section 11.6.2.2.1.
[4] Source of drive terminator power is an active circuit which has an input source voltage selected by jumper
plug TP. See Figure 10.1-1. Applies to model "N" only.
Figure 11.6.4-1. Single ended transmitters and receivers
50
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
_____________________________________________________________________________________
11.6.4.2
Differential drivers/receivers
Differential drivers and receivers are used by the "ND" models. Typical circuits are shown in Figure 11.6.4-2.
The drive has no provisions for terminator circuits on differential I/O drives.
Differential Signals
All differential interface signals consist of two lines denoted +SIGNAL and -SIGNAL. A signal is true when
+SIGNAL is more positive than -SIGNAL, and a signal is false when -SIGNAL is more positive than +SIGNAL.
All assigned signals shall be terminated at each end of the cable as shown in Figure 11.6.4-2. Drive user or
systems integrator must provide some external means of termination.
Output Characteristics
Each signal driven by differential interface drives shall have the following output characteristics when
measured at the disc drive SCSI connector:
Low-level output voltage* = 2.0 V maximum at Low-level output current = 55 milliamps.
High-level output voltage* = 3.0 V minimum at High-level output current = -55 milliamps
Differential voltage = 1.0 V minimum with common-mode voltage ranges from -7 V dc to +12 V dc.
* These voltages shall be measured between the output terminal and the SCSI device’s logic ground reference.
The output characteristics shall additionally conform to EIA RS-485-1983.
Input Characteristics
Each signal received by differential interface drives shall have the following input characteristics when
measured at the disc drive SCSI connector:
Input current on either input = +2.0 milliamps maximum (includes both receivers and passive drivers).
This requirement shall be met with the input voltage varying between -7 V dc and +12 V dc, with power on or
off, and with the hysteresis equaling 35 mv, minimum.
The input characteristics shall additionally conform to EIA RS-485-1983.
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
51
_____________________________________________________________________________________
+5V
Term [5]
Power
+5V
5.6K
TE
Transmit/Receive
Enable
[1]
LSI
RE XCVR
DIFFSENS [6]
Disable
330
Ohm
[3] Twisted or Flat
Cable Pair
1
Transmit or
Receive
Signal [2]
150
Ohm
1
R
[4]
2
330
Ohm
[7]
SCSI Device at Beginning of I/O Cable
(usually Host Adaptor/Initiator)
+5V
Term [5]
Power
+5V
5.6K
TE
Transmit/Receive
Enable
[1]
LSI
RE XCVR
DIFFSENS [6]
Disable
330
Ohm
1
Transmit or
Receive
Signal [2]
1
R
2
[4]
150
Ohm
330
Ohm
[7]
SCSI Device at End of I/O Cable
(Drive/Target)
Notes.
[1] Positive Logic Enables Transmitter (+5 V = Asserted)
Negative Logic Enables Receivers (0 V = Asserted)
[2] Negative Logic Signal (0 V = Asserted)
[3] Total interface cable length should not exceed value given in paragraph 11.6.2.2 from first SCSI device
at beginning to end of daisy-chain. See section 11.6.4.2 for signal characteristics.
[4] I/O Line terminators. If SCSI device is a Seagate disc drive, terminators and a place to plug them in must
be provided external to the drive by user, systems integrator or host equipment manufacturer where
needed. The drive has no terminators and there are no provisions on the drive for terminator installation.
[5] Arrangements for connecting terminator power to the terminators must be made by the systems designer.
As a help, drive +5 V power is made available on SCSI bus pin 26 ("N" and "ND" models) for powering
external terminators if the drive option select header jumper TP (Figure 10.1-1) is installed in rightmost
position “TP”.
[6] SCSI I/O line (pin 21) disables I/O circuits if single-ended cable plugged in or cable plugged in upside down.
[7] SCSI I/O cable ground. See Table 11.6.3-1b.
Figure 11.6.4-2. Typical differential I/O line transmitter/receiver and external terminators
52
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
______________________________________________________________________________________
11.6.4.3
Terminator requirements
Internal disc drive I/O termination (provided only in single ended I/O model drives) consists of active circuits
in an LSI module that is permanently mounted on the PCB. All single initiator/single target (nondaisychain)
applications require that the Initiator and disc drive be terminated. Daisychain applications require that only the
units at each end of the daisy-chain be terminated. All other peripherals on the chain must not be terminated.
(See Figure 11.6.3-2).
Note.
Remove drive terminator enabling jumper TE (see Figure 10.1-1) where terminators are not required.
Removal of terminator power source selection jumper TP (see Figure 10.1-1) does not disconnect
the terminator resistors from the circuit.
It is highly recommended that ANSI SCSI-2 Standard's Alternative 2 termination (active termination) be used
for applications with single-ended ("N" models), especially if the bus will be operated at transfer rates above
5 Mbytes/sec. The "N" model provides on-board active termination that can be disabled by removal of the
enable jumper TE (see Figure 10.1-1).
Note.
ACTIVE TERMINATORS ARE HIGHLY RECOMMENDED FOR USE IN THE DAISYCHAIN AS
DESCRIBED ABOVE. ACTIVE AND PASSIVE TERMINATORS SHOULD NOT BE MIXED ON THE
SAME SCSI BUS.
Differential I/O "ND" models do not have terminators on the PCB. The user, systems integrator or host
equipment manufacturer must provide a terminator arrangement external to the drive.
11.6.4.4
Terminator power
The drive may be configured to accept terminator power from pin 26 of the SCSI Bus, to supply power to the
SCSI bus or to provide terminator power for internal termination circuits from the drive power connector. See
Figures 10.1-1 and 11.6-1. The drive can provide power both to its own terminators and to the SCSI Bus
terminator power line (Pin 26) if both "TP" jumpers are on.
SCSI devices providing terminator power (TERMPWR)* shall have the following characteristics:
V TERM = 4.50 V to 5.25 V
800 mA min source drive capability
1.0 A maximum
*See Figure 10.1-1 for configuration details.
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
53
______________________________________________________________________________________
11.7
Disc drive SCSI timing
Table 11.7-1. Disc drive SCSI timing
Description
Target Select Time (no Arbitration)
Target Select Time (with Arbitration)
Target Select to Command
Target Select to MSG Out
Identify MSG to Command
Command to Status
Command to Data (para. In)
Command to Data (para. Out)
Command to Data (Write to Data Buffer)
Command to Disconnect MSG
Disconnect MSG to Bus Free
Disconnect to Arbitration (for Reselect)
This measures disconnected CMD overhead.
Target win Arbitration (for Reselect)
Arbitration to Reselect
Reselect to Identify MSG In
Reselect Identify MSG to Status
Reselect Identify MSG to Data (media)
Data to Status
Status to Command Complete MSG
Command Complete MSG to Bus Free
Data to Save Data Pointer MSG
Save Data Pointer MSG to Disconnect
MSG
Command Byte Transfer
Next Command Byte Access
Next CDB Byte Access (Byte 2 of 6)
Next CDB Byte Access (Byte 3 of 6)
Next CDB Byte Access (Byte 4 of 6)
Next CDB Byte Access (Byte 5 of 6)
Next CDB Byte Access (Byte 6 of 6)
Waveform
Symbol [1]
T00
T01
T02
T03
T04
T05
T06
T07
T08
T09
T10
T11
Waveform
Table [1]
N/A
4.5-1,2
4.5-1
4.5-2
4.5-3
4.5-5
4.5-9
4.5-10
4.5-10
4.5-6
4.5-6,14
4.5-6
T12
T13
T14
T15
T16
T17
T18
T19
T20
4.5-7
4.5-7
4.5-7
4.5-8
4.5-11
4.5-15
4.5-5,8,15
4.5-5,8,15
4.5-14
T21
T22
4.5-14
4.5-4
4.5-4
4.5-4
4.5-4
4.5-4
4.5-4
4.5-4
T23.6.2
T23.6.3
T23.6.4
T23.6.5
T23.6.6
Typical
<1 µs
1.74 µs
3.87 µs
1.86 µs
3.56 µs
Command Dependent
Command Dependent
Command Dependent
Command Dependent
Command Dependent
0.52 µs
Command Dependent
Command Dependent
Command Dependent
Command Dependent
0.64 µs
0.12 µs
0.11 µs
0.12 µs
0.12 µs
54
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
_____________________________________________________________________________________
continued from previous page
Description
Symbol [1]
Asynchronous Data Transfer Characteristics: (continued)
Next CDB Byte Access (Byte 2 of 10)
T23.10.2
Next CDB Byte Access (Byte 3 of 10)
T23.10.3
Next CDB Byte Access (Byte 4 of 10)
T23.10.4
Next CDB Byte Access (Byte 5 of 10)
T23.10.5
Next CDB Byte Access (Byte 6 of 10)
T23.10.6
Next CDB Byte Access (Byte 7 of 10)
T23.10.7
Next CDB Byte Access (Byte 8 of 10)
T23.10.8
Next CDB Byte Access (Byte 9 of 10)
T23.10.9
Next CDB Byte Access (Byte 10 of 10)
T23.10.10
Data In Byte Transfer (parameter)
T24
Data Out Byte Transfer (parameter)
T25
Next Data In Byte Access (parameter)
T26
Next Data Out Byte Access (parameter)
T27
Data In Byte Transfer (media) [2]
T28
Data Out Byte Transfer (media) [2]
T29
Next Data In Byte access (media [2]
T30
Next Data Out Byte access (media [2]
T31
MSG IN Byte Transfer
T32
MSG OUT Byte Transfer
STATUS Byte Transfer
T33
T34
Synchronous Data Transfer Characteristics:
Request Signal Transfer Period [3]
-
-
Waveform
Table [1]
Waveform
Typical
4.5-4
4.5-4
4.5-4
4.5-4
4.5-4
4.5-4
4.5-4
4.5-4
4.5-4
4.5-12
4.5-13
4.5-12
4.5-13
4.5-12
4.5-13
4.5-12
4.5-13
4.5-5,7
4.5-8,14,15
4.5-2
4.5-5,8
4.5-15
0.65 µs
0.11 µs
0.12 µs
0.11 µs
0.11 µs
0.13 µs
0.12 µs
0.12 µs
0.12 µs
0.10 µs
0.10 µs
0.05 µ
0.05 µ
0.10 µs
0.10 µs
various
Notes.
[1] See SCSI-2 Interface Manual P/N 77738479 (called Volume 2), section 4.5
[2] Maximum SCSI asynchronous interface transfer rate is given in section 5.3.
[3] Synchronous Transfer Period is determined by negotiations between an Initiator and a Drive. The Drive
is capable of setting periods as given in section 11.5. See also sections 3.1.5.2 and 3.5.3.2 of the SCSI2 Interface Product Manual (P/N 77738479) for a description of synchronous data transfer operation.
General timing diagrams for SCSI interface operation are shown in the SCSI-2 Interface Product Manual
P/N 77738479, Section 4.5. The specific timing values that apply to this drive are listed in Table 11.7-1.
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
55
______________________________________________________________________________________
12.0
Options
All options are incorporated or packaged at the manufacturing facility.
12.1
Front panel
The normal front panel available is black plastic. Other panel colors may be special ordered. Each panel has
a single rectangular green rectangular LED indicator lens which, when glowing, indicates the drive is selected.
12.2
Single unit shipping pack
The drive is normally shipped in bulk packaging to provide maximum protection against transit damage. Units
shipped individually require additional protection as provided by the single unit shipping pack. Users planning
single unit distribution should specify this option.
12.3
Installation Guide
The Installation Guide (P/N 77767475) is usually included with each drive shipped, but extra copies may be
ordered. The Installation Guide provides basic information on the care and handling of Winchester disc
peripherals in general. Some information needed when installing the drive is included to assist individuals not
familiar with the product. It also includes basic information to assist in obtaining service for the drive.
56
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
_____________________________________________________________________________________
13.0
Accessories
All accessories are designed for implementation by the customer.
13.1
Front panel kit
Same as 12.1 but includes all mounting hardware to support field installation.
13.2
Additional Installation Guide copies
The Installation Guide (P/N 77767475) is usually included with each drive shipped, but extra copies may be
ordered.
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
57
_____________________________________________________________________________________
14.0
Technical support services
Seagate Technology provides technical support literature and diagnostic utilities to Authorized Distributors.
Please contact your dealer for technical support and installation troubleshooting. Product Technical Support
is available for all Seagate products by calling the SeaFAXTM, SeaFoneTM, SeaTDDTM or SeaBOARDTM
services. These are toll calls.
SeaFAX number: United States 408/438-2620
England 44-62-847-7080
You can use a touch-tone telephone to access Seagate’s automated FAX delivery system and select technical
support information by return FAX. This service is available 24 hours a day, 7 days a week.
SeaFone telephone number: 408/438-8222
The enhanced phone system provides recorded technical information on selected Seagate products while you
are on hold. Technical support specialists are available to answer questions from 8:00 AM to 5:00 PM PST,
Monday through Friday. Recordings are accessible 24 hours a day, 7 days a week.
SeaTDD telephone number: 408/438-5382
TDD is a Telecommunication Device for the Deaf where two people can communicate using a keyboard that
is connected to the phone line. A TDD device is required to access this service. This service is available from
8:00 AM to 5:00 PM PST, Monday through Friday.
SeaBOARD service:
The Seagate Technical Support Bulletin Board System (BBS) is available 24 hours a day, 7 days a week. A
modem is required to access this service. (300–9600 baud, 8-N-1). This is a toll call.
With this service you can access:
• Specifications and jumper configurations for all Seagate products.
• Reprints of Seagate documentation.
• A directory of information and helpful utilities that you can download to your own computer.
BBS
Location
Modem
Number
USA, Mexico, Latin America
Canada
England
France
Germany
Singapore
Australia
Korea
408-438-8771
416/856-5581
44-62-847-8011
33-1-40-67-1034
49-89-140-9331
65-292-6973
61-2-756-2359
82-2-556-7294
Seagate Technology, Inc.
920 Disc Drive, Scotts Valley, California 95066-4544, USA
Publication Number: 77767471, Revision F
Printed in USA